664065752 has 32 divisors (see below), whose sum is σ = 1484870400. Its totient is φ = 272225184.

The previous prime is 664065737. The next prime is 664065767. The reversal of 664065752 is 257560466.

It is an interprime number because it is at equal distance from previous prime (664065737) and next prime (664065767).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256502 + ... + 259077.

It is an arithmetic number, because the mean of its divisors is an integer number (46402200).

Almost surely, 2^664065752 is an apocalyptic number.

It is an amenable number.

664065752 is an abundant number, since it is smaller than the sum of its proper divisors (820804648).

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

664065752 is a wasteful number, since it uses less digits than its factorization.

664065752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515615 (or 515611 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 664065752 is about 25769.4732581013. The cubic root of 664065752 is about 872.4429300143.

The spelling of 664065752 in words is "six hundred sixty-four million, sixty-five thousand, seven hundred fifty-two".