660172 has 12 divisors (see below), whose sum is σ = 1164016. Its totient is φ = 327600.

The previous prime is 660167. The next prime is 660181. The reversal of 660172 is 271066.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58 + ... + 1150.

2⁶⁶⁰¹⁷² is an apocalyptic number.

It is an amenable number.

660172 is a deficient number, since it is larger than the sum of its proper divisors (503844).

660172 is a wasteful number, since it uses less digits than its factorization.

660172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 660172 is about 812.5096922499. The cubic root of 660172 is about 87.0734395532.

The spelling of 660172 in words is "six hundred sixty thousand, one hundred seventy-two".