# 66 (number)

**66**(

**sixty-six**) is the natural number following 65 and preceding 67.

Cardinal | 66 sixty-six |

Ordinal | 66th sixty-sixth |

Factorization | |

Divisors | 1, 2, 3, 6, 11, 22, 33, 66 |

Roman numeral | LXVI |

Binary | 1000010 |

Hexadecimal | 42 |

## In mathematics

66 is a sphenic number, a triangular number, a hexagonal number, and a semi-meandric number. Being a multiple of a perfect number, 66 is itself a semiperfect number.## In science

- The atomic number of dysprosium, a lanthanide.

### Astronomy

- Messier object Spiral Galaxy M66, a magnitude 10.0 galaxy in the constellation Leo
- The New General Catalogue object NGC 66, a peculiar barred spiral galaxy in the constellation Cetus
- The Saros number of the solar eclipse series which began on -756 March 12 and ended on 542 May 1. The duration of Saros series 66 was 1298.1 years, and it contained 73 solar eclipses.
- The Saros number of the lunar eclipse series which began on -671 August 12 and ended on 826 January 27. The duration of Saros series 66 was 1496.5 years, and it contained 84 lunar eclipses.

## In sports

- In american football, 66 is nearly synonymous with former Green Bay Packers linebacker Ray Nitschke.

- The last Packer to wear number 66 before it was retired in 1983 to honor Nitschke was offensive tackle Larry Pfohl who is better known to pro wrestling fans as Lex Luger.

- In football, 66 is a common abbreviation for the year 1966, when the English Football team won the World Cup
- NFL Green Bay Packers Ray Nitschike wore #66
- NFL Chargers and Dolphins Larry Little wore #66
- NFL Dallas Cowboys George Andrie wore #66
- NHL Pittsburgh Penguins Mario Lemieux wears #66
- MLB Detroit Tigers Cameron Maybin wears #66

## In Computers

- 66 (more specifically 66.667) Megahertz (MHz) is a very common divisor for the Front side bus (FSB) speed, Overall Central processing unit (CPU) speed, and base bus speed. On a Core 2 CPU, and a Core 2 Motherboard, the FSB is 1066MHz (~16 x 66MHz), the memory speed is usually 666.67MHz (~10 x 66MHz), and the processor speed is ranges from 1.86 Gigahertz (GHz)(~66MHz x 28) to 2.93 GHz (~66MHz x 44), in 266Mhz (~66MHz x 4) increments.

## Cinema

- 66 is a 2006 movie about a barmitzvah which takes place in London on the day of the 1966 world cup final.
- In
*Star Wars*, Order 66 is a prepared order to the clone troopers to kill the Jedi commanding them

## Television

## In other fields

**Sixty-six**is:

- The designation of the historic Route 66, dubbed the "Mother Road" by novelist John Steinbeck
- The designation of US Interstate 66, a freeway that runs from Virginia to Washington, D.C.
- The designation of 36 state and 2 territorial highways (see list of highways numbered 66)
- Phillips 66, a brand of gasoline and service station in the United States
- The international direct dialing (IDD) code for Thailand
- The number of the French department PyrÃ©nÃ©es-Orientales
- The name of a German card game, translated from sechsundsechzig
- The name of a card game derived from the German card game, Sixty-six (game)
- The total number of books in the Protestant edition of the Bible (Old Testament and New Testament) combined
- The total number of chapters in the Bible book of Isaiah
- The number of verses in Chapter 3 of the book of Lamentations in the Old Testament
- In
*Abjad numerals*, The Name Of Allah (الله) numeric value is**66** - In Telecommunications a 66 block is used to organize telephone lines.
- In British history, the years of three key events:

- 66 is the number of hot dogs eaten by World record holder Joey Chestnut in 15 minutes at the Nathan's Hot Dog Eating Championships in 2007.
- In Condoleezza Rice is the 66th U.S. Secretary of State
- Noah Webster completed his American Dictionary of the English Language 1825 at age 66
- Sergio Mendes and Brazil '66 was a sixties group
- 66 WNBC radio was a popular New York radio station (became WFAN as of July 1, 1987)
- sixty-six.org a weblog chronicling a Soldier’s deployment to Iraq

## In Anime

- In Full Metal Alchemist elusive villain Barry the Chopper is imprisoned in cell number 66, which later becomes his alias when battling the brothers at Laboratory Five.

## Historical years

**66 A.D.**, 66 B.C., 1966, 2066, etc.

In mathematics, a

**natural number**can mean either an element of the set (i.e the positive integers or the**counting numbers**) or an element of the set (i.e. the non-negative integers).**.....**Click the link for more information.**65**(

**sixty-five**) is the natural number following 64 and preceding 66.

## In mathematics

**Sixty-five**is an octagonal number. It is also a Cullen number. Given 65, the Mertens function returns 0.

**.....**Click the link for more information.

**67**(

**sixty-seven**) is the natural number following 66 and preceding 68. It is an odd number.

## In mathematics

**Sixty-seven**is the 19th prime number (the next is 71), an irregular prime, a lucky prime, and the sum of five consecutive primes (7 + 11 + 13 + 17

**.....**Click the link for more information.

**59**(

**fifty-nine**) is the natural number following 58 and preceding 60.

## In mathematics

**Fifty-nine**is the 17th smallest prime number. The next is sixty-one, with which it comprises a twin prime.

**.....**Click the link for more information.

**60**(

**sixty**) is the natural number following 59 and preceding 61. Being thrice twenty, 60 is called "three score" in some older literature.

## In mathematics

**Sixty**

**.....**Click the link for more information.

**61**(

**sixty-one**) is the natural number following 60 and preceding 62.

## In mathematics

It is the 18th prime number. The previous is 59, with which it comprises a twin prime. Sixty-one is a cuban prime of the form .**.....**Click the link for more information.

**62**(

**sixty-two**) is a natural number following 61 and preceding 63.

## In science

- The atomic number of samarium, a lanthanide

## In mathematics

**Sixty-two**is a composite number with divisors 2 and 31. It is a nontotient.

**.....**Click the link for more information.

**63**(

**sixty-three**) is a natural number following 62 and preceding 64.

## In mathematics

Although a number of the form 2^{n}- 1, 63 is not a Mersenne prime since n is not prime and 63 is certainly not prime either.

**.....**Click the link for more information.

**64**(

**sixty-four**) is the natural number following 63 and preceding 65.

## In mathematics

**Sixty-four**is the square of 8, the cube of 4, and the sixth power of 2. It is the smallest number with exactly seven divisors.

**.....**Click the link for more information.

**65**(

**sixty-five**) is the natural number following 64 and preceding 66.

## In mathematics

**Sixty-five**is an octagonal number. It is also a Cullen number. Given 65, the Mertens function returns 0.

**.....**Click the link for more information.

**67**(

**sixty-seven**) is the natural number following 66 and preceding 68. It is an odd number.

## In mathematics

**Sixty-seven**is the 19th prime number (the next is 71), an irregular prime, a lucky prime, and the sum of five consecutive primes (7 + 11 + 13 + 17

**.....**Click the link for more information.

**68**(

**sixty-eight**) is the natural number following 67 and preceding 69

## In mathematics

**Sixty-eight**is a nontotient. It is also a Perrin number, preceded in the sequence by 29, 39, 51 (it is the sum of the first two mentioned). It is also a Happy number.

**.....**Click the link for more information.

**69**(

**sixty-nine**) is a number following 68 and preceding 70.

## In mathematics

- Adding up the divisors of 1 through 9 gives 69.
- Because 69 has an odd number of 1s in its binary representation, it is sometimes called an "odious number"

**.....**Click the link for more information.

**70**(

**seventy**) is the natural number following 69 and preceding 71. The French do not have a word for 70, instead using "soixante-dix" (60 + 10). Other French-speaking countries such as Belgium and Switzerland do have a word for it, using "septante.

**.....**Click the link for more information.

This is a

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**list of articles about numbers**(*not*about numerals).## Rational numbers

### Notable rational numbers

#### Natural numbers

0 1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19

20 21 22 23 24 25 26 27 28 29

30 31 32 33 34 35 36 37 38 39

**.....**Click the link for more information. The

**integers**(from the Latin*integer*, which means with untouched integrity, whole, entire) are the set of numbers including the whole numbers (0, 1, 2, 3, …) and their negatives (0, −1, −2, −3, …).**.....**Click the link for more information.**0**(

**zero**) is both a number and a numerical digit used to represent that number in numerals. It plays a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures.

**.....**Click the link for more information.

**10**(

**ten**) is an even natural number following 9 and preceding 11.

← 0

→

**.....**Click the link for more information.

**.....**Click the link for more information.

**30**(

**thirty**) is the natural number following 29 and preceding 31.

## In mathematics

It is a primorial as well as the sum of the squares of the integers 1, 2, 3 and 4. It is the smallest Giuga number.**.....**Click the link for more information.

**40**(

**forty**) is the natural number following 39 and preceding 41.

Despite being related to the word "four" (4), 40 is spelled as "forty", not "fourty". The letters of the word "forty" are in alphabetical order; this is the only number that has this linguistic property

**.....**Click the link for more information.

**50**(

**fifty**) is the integer following 49 and preceding 51.

(the number

**fifty**derives from the two numerical figures of both 0 and 5 placed in order from greatest to least)

## In mathematics

**Fifty**

**.....**Click the link for more information.

**60**(

**sixty**) is the natural number following 59 and preceding 61. Being thrice twenty, 60 is called "three score" in some older literature.

## In mathematics

**Sixty**

**.....**Click the link for more information.

**70**(

**seventy**) is the natural number following 69 and preceding 71. The French do not have a word for 70, instead using "soixante-dix" (60 + 10). Other French-speaking countries such as Belgium and Switzerland do have a word for it, using "septante.

**.....**Click the link for more information.

**80**(

**eighty**) is the natural number following 79 and preceding 81.

## In mathematics

The sum of Euler's totient function φ(*x*) over the first sixteen integers is 80.

Adding up some subsets of its divisors (e.g.

**.....**Click the link for more information.

**90**(

**ninety**) is the natural number preceded by 89 and followed by 91.

## In mathematics

90 is the sum of the squares of the integers 2 to 6. Because 90 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number, and because it is equal**.....**Click the link for more information.

**100**(

**one hundred**) (the Roman numeral is C for

*centum*) is the natural number following 99 and preceding 101.

## In mathematics

**One hundred**is the square of 10 (in scientific notation it is written as ).

**.....**Click the link for more information.

**cardinal numbers**, or

**cardinals**for short, are a generalized kind of number used to denote the size of a set, known as its

**cardinality**. For finite sets the cardinality is given by a natural number, being simply the number of elements in the set.

**.....**Click the link for more information.

**ordinal**,

**ordinal number**, and

**transfinite ordinal number**refer to a type of number introduced by Georg Cantor in 1897, to accommodate infinite sequences and to classify sets with certain kinds of order structures on them.

**.....**Click the link for more information.

**factorization**(British English:

*also*

**factorisation**) or

**factoring**is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or

**factors**, which when multiplied together give the original.

**.....**Click the link for more information.

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