657512164 has 9 divisors (see below), whose sum is σ = 1150736041. Its totient is φ = 328730440.

The previous prime is 657512143. The next prime is 657512189. The reversal of 657512164 is 461215756.

It is a happy number.

The square root of 657512164 is 25642.

It is a perfect power (a square), and thus also a powerful number.

657512164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36505764 + 621006400 = 6042^2 + 24920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44874 + ... + 57694.

Almost surely, 2^657512164 is an apocalyptic number.

657512164 is the 25642-nd square number.

It is an amenable number.

657512164 is a deficient number, since it is larger than the sum of its proper divisors (493223877).

657512164 is an frugal number, since it uses more digits than its factorization.

657512164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25646 (or 12823 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The cubic root of 657512164 is about 869.5634238872.

The spelling of 657512164 in words is "six hundred fifty-seven million, five hundred twelve thousand, one hundred sixty-four".