664644352 has 36 divisors (see below), whose sum is σ = 1328485536. Its totient is φ = 331873280.

The previous prime is 664644293. The next prime is 664644367. The reversal of 664644352 is 253446466.

It is a super-2 number, since 2×664644352² = 883504229290999808, which contains 22 as substring.

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, 270393 + ... + 272839.

It is an arithmetic number, because the mean of its divisors is an integer number (36902376).

Almost surely, 2^664644352 is an apocalyptic number.

It is an amenable number.

664644352 is a deficient number, since it is larger than the sum of its proper divisors (663841184).

664644352 is a wasteful number, since it uses less digits than its factorization.

664644352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524 (or 3510 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

The square root of 664644352 is about 25780.6972752872. The cubic root of 664644352 is about 872.6962427520.

The spelling of 664644352 in words is "six hundred sixty-four million, six hundred forty-four thousand, three hundred fifty-two".