664463256 has 32 divisors (see below), whose sum is σ = 1661817600. Its totient is φ = 221399840.

The previous prime is 664463249. The next prime is 664463257. The reversal of 664463256 is 652364466.

It is a super-2 number, since 2×664463256² = 883022837148243072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664463257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90325 + ... + 97403.

It is an arithmetic number, because the mean of its divisors is an integer number (51931800).

Almost surely, 2^664463256 is an apocalyptic number.

It is an amenable number.

664463256 is an abundant number, since it is smaller than the sum of its proper divisors (997354344).

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

664463256 is a wasteful number, since it uses less digits than its factorization.

664463256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999 (or 10995 counting only the distinct ones).

The product of its digits is 622080, while the sum is 42.

The square root of 664463256 is about 25777.1847958616. The cubic root of 664463256 is about 872.6169742156.

The spelling of 664463256 in words is "six hundred sixty-four million, four hundred sixty-three thousand, two hundred fifty-six".