Sixty-eight

Sixty-eight (68, LXVIII) is a natural number following sixty-seven and preceding sixty-nine. It is a composite number with the divisors being 2, 4, 17 and 34. Its factorization is:

Sixty-eight is also:

• The atomic number of erbium, a lanthanide.
• 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.

This article is about the number 68. For the year AD 68, see 68.