664325717 has 4 divisors (see below), whose sum is σ = 724718976. Its totient is φ = 603932460.

The previous prime is 664325699. The next prime is 664325719. The reversal of 664325717 is 717523466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664325717 - 2⁶ = 664325653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664325719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30196613 + ... + 30196634.

It is an arithmetic number, because the mean of its divisors is an integer number (181179744).

Almost surely, 2^664325717 is an apocalyptic number.

It is an amenable number.

664325717 is a deficient number, since it is larger than the sum of its proper divisors (60393259).

664325717 is a wasteful number, since it uses less digits than its factorization.

664325717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60393258.

The product of its digits is 211680, while the sum is 41.

The square root of 664325717 is about 25774.5168140937. The cubic root of 664325717 is about 872.5567616321.

The spelling of 664325717 in words is "six hundred sixty-four million, three hundred twenty-five thousand, seven hundred seventeen".