664605325 has 24 divisors (see below), whose sum is σ = 854722080. Its totient is φ = 512030400.

The previous prime is 664605299. The next prime is 664605353. The reversal of 664605325 is 523506466.

664605325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664605325 - 2⁷ = 664605197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355042 + ... + 356908.

It is an arithmetic number, because the mean of its divisors is an integer number (35613420).

Almost surely, 2^664605325 is an apocalyptic number.

It is an amenable number.

664605325 is a deficient number, since it is larger than the sum of its proper divisors (190116755).

664605325 is a wasteful number, since it uses less digits than its factorization.

664605325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2392 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 664605325 is about 25779.9403606758. The cubic root of 664605325 is about 872.6791612442.

The spelling of 664605325 in words is "six hundred sixty-four million, six hundred five thousand, three hundred twenty-five".