664757752 has 8 divisors (see below), whose sum is σ = 1246420800. Its totient is φ = 332378872.

The previous prime is 664757729. The next prime is 664757761. The reversal of 664757752 is 257757466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 664757696 and 664757705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41547352 + ... + 41547367.

It is an arithmetic number, because the mean of its divisors is an integer number (155802600).

Almost surely, 2^664757752 is an apocalyptic number.

It is an amenable number.

664757752 is a deficient number, since it is larger than the sum of its proper divisors (581663048).

664757752 is a wasteful number, since it uses less digits than its factorization.

664757752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83094725 (or 83094721 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 49.

The square root of 664757752 is about 25782.8965013631. The cubic root of 664757752 is about 872.7458723651.

The spelling of 664757752 in words is "six hundred sixty-four million, seven hundred fifty-seven thousand, seven hundred fifty-two".