166040256 has 28 divisors (see below), whose sum is σ = 439315352. Its totient is φ = 55346688.

The previous prime is 166040249. The next prime is 166040261. The reversal of 166040256 is 652040661.

It is a super-2 number, since 2×166040256² = 55138733225091072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432205 + ... + 432588.

It is an arithmetic number, because the mean of its divisors is an integer number (15689834).

Almost surely, 2^166040256 is an apocalyptic number.

166040256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166040256 is an abundant number, since it is smaller than the sum of its proper divisors (273275096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166040256 is an equidigital number, since it uses as much as digits as its factorization.

166040256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864808 (or 864798 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 166040256 is about 12885.6608678019. The cubic root of 166040256 is about 549.6308884284.

The spelling of 166040256 in words is "one hundred sixty-six million, forty thousand, two hundred fifty-six".