166072864 has 24 divisors (see below), whose sum is σ = 346189788. Its totient is φ = 78151680.

The previous prime is 166072853. The next prime is 166072871. The reversal of 166072864 is 468270661.

It can be written as a sum of positive squares in 2 ways, for example, as 161493264 + 4579600 = 12708^2 + 2140^2 .

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, 152097 + ... + 153184.

Almost surely, 2^166072864 is an apocalyptic number.

It is an amenable number.

166072864 is an abundant number, since it is smaller than the sum of its proper divisors (180116924).

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

166072864 is a wasteful number, since it uses less digits than its factorization.

166072864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305308 (or 305300 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 166072864 is about 12886.9260880941. The cubic root of 166072864 is about 549.6668660307. Note that the first 3 decimals are identical.

The spelling of 166072864 in words is "one hundred sixty-six million, seventy-two thousand, eight hundred sixty-four".