172665168 has 40 divisors (see below), whose sum is σ = 480365088. Its totient is φ = 53127552.

The previous prime is 172665161. The next prime is 172665187. The reversal of 172665168 is 861566271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172665161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137730 + ... + 138977.

Almost surely, 2^172665168 is an apocalyptic number.

It is an amenable number.

172665168 is an abundant number, since it is smaller than the sum of its proper divisors (307699920).

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

172665168 is a wasteful number, since it uses less digits than its factorization.

172665168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276731 (or 276725 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 172665168 is about 13140.2118704380. The cubic root of 172665168 is about 556.8457531930.

The spelling of 172665168 in words is "one hundred seventy-two million, six hundred sixty-five thousand, one hundred sixty-eight".