657612968 has 8 divisors (see below), whose sum is σ = 1233024330. Its totient is φ = 328806480.

The previous prime is 657612959. The next prime is 657612979. The reversal of 657612968 is 869216756.

It can be written as a sum of positive squares in only one way, i.e., 653211364 + 4401604 = 25558^2 + 2098^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41100803 + ... + 41100818.

Almost surely, 2^657612968 is an apocalyptic number.

It is an amenable number.

657612968 is a deficient number, since it is larger than the sum of its proper divisors (575411362).

657612968 is a wasteful number, since it uses less digits than its factorization.

657612968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82201627 (or 82201623 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 50.

The square root of 657612968 is about 25643.9655279756. The cubic root of 657612968 is about 869.6078595631.

The spelling of 657612968 in words is "six hundred fifty-seven million, six hundred twelve thousand, nine hundred sixty-eight".