166604772 has 12 divisors (see below), whose sum is σ = 388744496. Its totient is φ = 55534920.

The previous prime is 166604723. The next prime is 166604783. The reversal of 166604772 is 277406661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166604772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6941854 + ... + 6941877.

Almost surely, 2^166604772 is an apocalyptic number.

166604772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166604772 is an abundant number, since it is smaller than the sum of its proper divisors (222139724).

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

166604772 is a wasteful number, since it uses less digits than its factorization.

166604772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13883738 (or 13883736 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 166604772 is about 12907.5470946265. The cubic root of 166604772 is about 550.2530758189.

The spelling of 166604772 in words is "one hundred sixty-six million, six hundred four thousand, seven hundred seventy-two".