166395172 has 24 divisors (see below), whose sum is σ = 295702400. Its totient is φ = 81914976.

The previous prime is 166395157. The next prime is 166395191. The reversal of 166395172 is 271593661.

166395172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 193279 + ... + 194137.

Almost surely, 2^166395172 is an apocalyptic number.

It is an amenable number.

166395172 is a deficient number, since it is larger than the sum of its proper divisors (129307228).

166395172 is a wasteful number, since it uses less digits than its factorization.

166395172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555 (or 1553 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 166395172 is about 12899.4252585144. The cubic root of 166395172 is about 550.0222272009.

The spelling of 166395172 in words is "one hundred sixty-six million, three hundred ninety-five thousand, one hundred seventy-two".