664952056 has 16 divisors (see below), whose sum is σ = 1255044240. Its totient is φ = 330273600.

The previous prime is 664952047. The next prime is 664952117. The reversal of 664952056 is 650259466.

It is a super-2 number, since 2×664952056² = 884322473557254272, which contains 22 as substring.

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, 274021 + ... + 276436.

It is an arithmetic number, because the mean of its divisors is an integer number (78440265).

Almost surely, 2^664952056 is an apocalyptic number.

It is an amenable number.

664952056 is a deficient number, since it is larger than the sum of its proper divisors (590092184).

664952056 is a wasteful number, since it uses less digits than its factorization.

664952056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550614 (or 550610 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 664952056 is about 25786.6643054118. The cubic root of 664952056 is about 872.8308965682.

The spelling of 664952056 in words is "six hundred sixty-four million, nine hundred fifty-two thousand, fifty-six".