664658496 has 42 divisors (see below), whose sum is σ = 1905125222. Its totient is φ = 221552640.

The previous prime is 664658483. The next prime is 664658509. The reversal of 664658496 is 694856466.

664658496 is a `hidden beast` number, since 66 + 46 + 58 + 496 = 666.

It is an interprime number because it is at equal distance from previous prime (664658483) and next prime (664658509).

It can be written as a sum of positive squares in only one way, i.e., 531948096 + 132710400 = 23064^2 + 11520^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 576385 + ... + 577536.

Almost surely, 2^664658496 is an apocalyptic number.

It is an amenable number.

664658496 is an abundant number, since it is smaller than the sum of its proper divisors (1240466726).

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

664658496 is a wasteful number, since it uses less digits than its factorization.

664658496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153939 (or 1153926 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The square root of 664658496 is about 25780.9715875876. The cubic root of 664658496 is about 872.7024331945.

The spelling of 664658496 in words is "six hundred sixty-four million, six hundred fifty-eight thousand, four hundred ninety-six".