96.

**Ninety-six** is an octagonal number (http://en.wikipedia.org/wiki/Octagonal_number), a refactorable number (http://en.wikipedia.org/wiki/Refactorable_number) and an untouchable number (http://en.wikipedia.org/wiki/Untouchable_number). Since it is a multiple of 6, it is a semiperfect number (http://en.wikipedia.org/wiki/Semiperfect_number).

The sum of Euler's totient function (http://en.wikipedia.org/wiki/Euler%27s_totient_function) φ(*x*) over the first seventeen integers is 96.

Since it is possible to find sequences of 96 consecutive integers such that each inner member member shares a factor with either the first or the last member, 96 is an Erdős–Woods number (http://en.wikipedia.org/wiki/Erd%C5%91s%E2%80%93Woods_number).

Written in base 10 (http://en.wikipedia.org/wiki/Base_10), the number 96 has 180° rotational symmetry (http://en.wikipedia.org/wiki/Rotational_symmetry).