664791496 has 16 divisors (see below), whose sum is σ = 1248379740. Its totient is φ = 331890240.

The previous prime is 664791493. The next prime is 664791499. The reversal of 664791496 is 694197466.

It is an interprime number because it is at equal distance from previous prime (664791493) and next prime (664791499).

It can be written as a sum of positive squares in 2 ways, for example, as 636552900 + 28238596 = 25230^2 + 5314^2 .

It is not an unprimeable number, because it can be changed into a prime (664791493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57571 + ... + 68146.

Almost surely, 2^664791496 is an apocalyptic number.

It is an amenable number.

664791496 is a deficient number, since it is larger than the sum of its proper divisors (583588244).

664791496 is a wasteful number, since it uses less digits than its factorization.

664791496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126384 (or 126380 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 664791496 is about 25783.5508803578. The cubic root of 664791496 is about 872.7606393677.

The spelling of 664791496 in words is "six hundred sixty-four million, seven hundred ninety-one thousand, four hundred ninety-six".