166365172 has 24 divisors (see below), whose sum is σ = 299575584. Its totient is φ = 80780832.

The previous prime is 166365169. The next prime is 166365193. The reversal of 166365172 is 271563661.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139563 + ... + 140749.

It is an arithmetic number, because the mean of its divisors is an integer number (12482316).

Almost surely, 2^166365172 is an apocalyptic number.

It is an amenable number.

166365172 is a deficient number, since it is larger than the sum of its proper divisors (133210412).

166365172 is a wasteful number, since it uses less digits than its factorization.

166365172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175 (or 2173 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 166365172 is about 12898.2623635899. The cubic root of 166365172 is about 549.9891700347.

The spelling of 166365172 in words is "one hundred sixty-six million, three hundred sixty-five thousand, one hundred seventy-two".