664794048 has 28 divisors (see below), whose sum is σ = 1758934760. Its totient is φ = 221597952.

The previous prime is 664794037. The next prime is 664794079. The reversal of 664794048 is 840497466.

It is a super-2 number, since 2×664794048² = 883902252512452608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 664793988 and 664794006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731043 + ... + 1731426.

Almost surely, 2^664794048 is an apocalyptic number.

It is an amenable number.

664794048 is an abundant number, since it is smaller than the sum of its proper divisors (1094140712).

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

664794048 is a wasteful number, since it uses less digits than its factorization.

664794048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462484 (or 3462474 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 664794048 is about 25783.6003692269. The cubic root of 664794048 is about 872.7617561501.

The spelling of 664794048 in words is "six hundred sixty-four million, seven hundred ninety-four thousand, forty-eight".