664680751436 has 48 divisors (see below), whose sum is σ = 1318708258560. Its totient is φ = 290605216320.

The previous prime is 664680751433. The next prime is 664680751447. The reversal of 664680751436 is 634157086466.

It is not an unprimeable number, because it can be changed into a prime (664680751433) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16802921 + ... + 16842431.

It is an arithmetic number, because the mean of its divisors is an integer number (27473088720).

Almost surely, 2^664680751436 is an apocalyptic number.

It is an amenable number.

664680751436 is a deficient number, since it is larger than the sum of its proper divisors (654027507124).

664680751436 is a wasteful number, since it uses less digits than its factorization.

664680751436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56574 (or 56572 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 664680751436 in words is "six hundred sixty-four billion, six hundred eighty million, seven hundred fifty-one thousand, four hundred thirty-six".