664108836688 has 20 divisors (see below), whose sum is σ = 1403684587008. Its totient is φ = 301867652960.

The previous prime is 664108836667. The next prime is 664108836733. The reversal of 664108836688 is 886638801466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886672656 + ... + 1886673007.

Almost surely, 2^664108836688 is an apocalyptic number.

It is an amenable number.

664108836688 is an abundant number, since it is smaller than the sum of its proper divisors (739575750320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664108836688 is a wasteful number, since it uses less digits than its factorization.

664108836688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773345682 (or 3773345676 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 64.

It can be divided in two parts, 66410 and 8836688, that added together give a palindrome (8903098).

The spelling of 664108836688 in words is "six hundred sixty-four billion, one hundred eight million, eight hundred thirty-six thousand, six hundred eighty-eight".