664363456 has 56 divisors (see below), whose sum is σ = 1349288640. Its totient is φ = 324480000.

The previous prime is 664363433. The next prime is 664363463. The reversal of 664363456 is 654363466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510006 + ... + 511306.

It is an arithmetic number, because the mean of its divisors is an integer number (24094440).

Almost surely, 2^664363456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664363456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674644320).

664363456 is an abundant number, since it is smaller than the sum of its proper divisors (684925184).

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

664363456 is a wasteful number, since it uses less digits than its factorization.

664363456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493 (or 1483 counting only the distinct ones).

The product of its digits is 933120, while the sum is 43.

The square root of 664363456 is about 25775.2489027749. The cubic root of 664363456 is about 872.5732840473.

The spelling of 664363456 in words is "six hundred sixty-four million, three hundred sixty-three thousand, four hundred fifty-six".