166664904 has 64 divisors (see below), whose sum is σ = 487280640. Its totient is φ = 46509120.

The previous prime is 166664899. The next prime is 166664921. The reversal of 166664904 is 409466661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4312 + ... + 18759.

It is an arithmetic number, because the mean of its divisors is an integer number (7613760).

Almost surely, 2^166664904 is an apocalyptic number.

166664904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166664904 is an abundant number, since it is smaller than the sum of its proper divisors (320615736).

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

166664904 is a wasteful number, since it uses less digits than its factorization.

166664904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23130 (or 23126 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 166664904 is about 12909.8762193911. The cubic root of 166664904 is about 550.3192680766.

The spelling of 166664904 in words is "one hundred sixty-six million, six hundred sixty-four thousand, nine hundred four".