166864904 has 16 divisors (see below), whose sum is σ = 315157500. Its totient is φ = 82822912.

The previous prime is 166864903. The next prime is 166864963. The reversal of 166864904 is 409468661.

It can be written as a sum of positive squares in 2 ways, for example, as 164608900 + 2256004 = 12830^2 + 1502^2 .

It is not an unprimeable number, because it can be changed into a prime (166864903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75029 + ... + 77220.

Almost surely, 2^166864904 is an apocalyptic number.

It is an amenable number.

166864904 is a deficient number, since it is larger than the sum of its proper divisors (148292596).

166864904 is a wasteful number, since it uses less digits than its factorization.

166864904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152392 (or 152388 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 166864904 is about 12917.6199046109. The cubic root of 166864904 is about 550.5393101176.

The spelling of 166864904 in words is "one hundred sixty-six million, eight hundred sixty-four thousand, nine hundred four".