172166364 has 24 divisors (see below), whose sum is σ = 446357520. Its totient is φ = 57388752.

The previous prime is 172166363. The next prime is 172166381. The reversal of 172166364 is 463661271.

It is a happy number.

172166364 is a `hidden beast` number, since 1 + 7 + 2 + 16 + 636 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172166363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796959 + ... + 797174.

It is an arithmetic number, because the mean of its divisors is an integer number (18598230).

Almost surely, 2^172166364 is an apocalyptic number.

It is an amenable number.

172166364 is an abundant number, since it is smaller than the sum of its proper divisors (274191156).

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

172166364 is a wasteful number, since it uses less digits than its factorization.

172166364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594146 (or 1594138 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 172166364 is about 13121.2180836994. The cubic root of 172166364 is about 556.3090211497.

The spelling of 172166364 in words is "one hundred seventy-two million, one hundred sixty-six thousand, three hundred sixty-four".