| Cardinal | One hundred [and] sixty-six |
| Ordinal | 166th |
| Factorization | |
| Divisors | 1, 2, 83, 166 |
| Roman numeral | CLXVI |
| Binary | 10100110 |
| Hexadecimal | A6 |
Given 166, the Mertens function returns 0. 166 is a centered triangular number
166 is a Smith number in base 10.
One hundred sixty-six is also: