657996464 has 10 divisors (see below), whose sum is σ = 1274868180. Its totient is φ = 328998224.

The previous prime is 657996439. The next prime is 657996503. The reversal of 657996464 is 464699756.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20562374 + ... + 20562405.

It is an arithmetic number, because the mean of its divisors is an integer number (127486818).

Almost surely, 2^657996464 is an apocalyptic number.

It is an amenable number.

657996464 is a deficient number, since it is larger than the sum of its proper divisors (616871716).

657996464 is a wasteful number, since it uses less digits than its factorization.

657996464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41124787 (or 41124781 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 56.

The square root of 657996464 is about 25651.4417528528. The cubic root of 657996464 is about 869.7768679547.

The spelling of 657996464 in words is "six hundred fifty-seven million, nine hundred ninety-six thousand, four hundred sixty-four".