664634325 has 48 divisors (see below), whose sum is σ = 1140998400. Its totient is φ = 340972800.

The previous prime is 664634297. The next prime is 664634357. The reversal of 664634325 is 523436466.

It is not a de Polignac number, because 664634325 - 2¹¹ = 664632277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 937071 + ... + 937779.

It is an arithmetic number, because the mean of its divisors is an integer number (23770800).

Almost surely, 2^664634325 is an apocalyptic number.

It is an amenable number.

664634325 is a deficient number, since it is larger than the sum of its proper divisors (476364075).

664634325 is a wasteful number, since it uses less digits than its factorization.

664634325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182 (or 1177 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The square root of 664634325 is about 25780.5028073542. The cubic root of 664634325 is about 872.6918541547.

The spelling of 664634325 in words is "six hundred sixty-four million, six hundred thirty-four thousand, three hundred twenty-five".