664376366725 has 24 divisors (see below), whose sum is σ = 843793697120. Its totient is φ = 518764720320.

The previous prime is 664376366711. The next prime is 664376366809. The reversal of 664376366725 is 527663673466.

It is not a de Polignac number, because 664376366725 - 2¹³ = 664376358533 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 (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1636887 + ... + 2002036.

Almost surely, 2^664376366725 is an apocalyptic number.

It is an amenable number.

664376366725 is a deficient number, since it is larger than the sum of its proper divisors (179417330395).

664376366725 is a wasteful number, since it uses less digits than its factorization.

664376366725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639109 (or 3639104 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 61.

The spelling of 664376366725 in words is "six hundred sixty-four billion, three hundred seventy-six million, three hundred sixty-six thousand, seven hundred twenty-five".