68 (number)
From Wikipedia, the free encyclopedia
68 (sixty-eight) is the natural number following 67 and preceding 69
| Cardinal | 68 sixty-eight |
| Ordinal | 68th sixty-eighth |
| Factorization |  |
| Divisors | 1, 2, 4, 17, 34, 68 |
| Roman numeral | LXVIII |
| Binary | 1000100 |
| Hexadecimal | 44 |
Contents |
[edit] 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).
[edit] In science
- The atomic number of erbium, a lanthanide
[edit] Astronomy
- Messier object M68, a magnitude 9.0 globular cluster in the constellation Hydra
- The New General Catalogue object NGC 68, a spiral galaxy in the constellation Andromeda
- The Saros number of the solar eclipse series which began on -626 March 16 and ended on 685 August 20. The duration of Saros series 68 was 1280.1 years, and it contained 72 solar eclipses.
- The Saros number of the lunar eclipse series which began on -613 July 3 and ended on 685 August 20. The duration of Saros series 68 was 1298.1 years, and it contained 73 lunar eclipses.
[edit] In other fields
Sixty-eight is:
- In degrees Fahrenheit, the ideal temperature for developing black-and-white film
- The designation of US Interstate 68, a freeway that runs from West Virginia to Maryland
- The registry of the U.S. Navy's aircraft carrier USS Nimitz (CVN-68), named after Admiral Chester Nimitz
- The number of the French department Haut-Rhin
- A publishing house in Canada for exiled Czech authors
- Number of European and New York Rangers ice hockey legend Jaromir Jagr.
