664468622686 has 16 divisors (see below), whose sum is σ = 1087550536320. Its totient is φ = 301965013080.

The previous prime is 664468622677. The next prime is 664468622711. The reversal of 664468622686 is 686226864466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3206196 + ... + 3407143.

It is an arithmetic number, because the mean of its divisors is an integer number (67971908520).

Almost surely, 2^664468622686 is an apocalyptic number.

664468622686 is a deficient number, since it is larger than the sum of its proper divisors (423081913634).

664468622686 is a wasteful number, since it uses less digits than its factorization.

664468622686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6617919.

The product of its digits is 191102976, while the sum is 64.

The spelling of 664468622686 in words is "six hundred sixty-four billion, four hundred sixty-eight million, six hundred twenty-two thousand, six hundred eighty-six".