664490212696 has 16 divisors (see below), whose sum is σ = 1246164436440. Its totient is φ = 332179696320.

The previous prime is 664490212679. The next prime is 664490212721. The reversal of 664490212696 is 696212094466.

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, 8133066 + ... + 8214361.

Almost surely, 2^664490212696 is an apocalyptic number.

It is an amenable number.

664490212696 is a deficient number, since it is larger than the sum of its proper divisors (581674223744).

664490212696 is a wasteful number, since it uses less digits than its factorization.

664490212696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16352514 (or 16352510 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 664490212696 in words is "six hundred sixty-four billion, four hundred ninety million, two hundred twelve thousand, six hundred ninety-six".