660431164 has 24 divisors (see below), whose sum is σ = 1225330848. Its totient is φ = 310387200.

The previous prime is 660431081. The next prime is 660431173. The reversal of 660431164 is 461134066.

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, 50064 + ... + 61864.

It is an arithmetic number, because the mean of its divisors is an integer number (51055452).

Almost surely, 2^660431164 is an apocalyptic number.

It is an amenable number.

660431164 is a deficient number, since it is larger than the sum of its proper divisors (564899684).

660431164 is a wasteful number, since it uses less digits than its factorization.

660431164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12645 (or 12643 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 660431164 is about 25698.8553052466. The cubic root of 660431164 is about 870.8483221481.

The spelling of 660431164 in words is "six hundred sixty million, four hundred thirty-one thousand, one hundred sixty-four".