166402504 has 8 divisors (see below), whose sum is σ = 312004710. Its totient is φ = 83201248.

The previous prime is 166402501. The next prime is 166402541. The reversal of 166402504 is 405204661.

166402504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 166358404 + 44100 = 12898^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (166402501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10400149 + ... + 10400164.

Almost surely, 2^166402504 is an apocalyptic number.

It is an amenable number.

166402504 is a deficient number, since it is larger than the sum of its proper divisors (145602206).

166402504 is a wasteful number, since it uses less digits than its factorization.

166402504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20800319 (or 20800315 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 166402504 is about 12899.7094540924. The cubic root of 166402504 is about 550.0303057681.

The spelling of 166402504 in words is "one hundred sixty-six million, four hundred two thousand, five hundred four".