664487270328912 has 40 divisors (see below), whose sum is σ = 1817568121784256. Its totient is φ = 208466594612736.

The previous prime is 664487270328911. The next prime is 664487270328971. The reversal of 664487270328912 is 219823072784466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664487270328911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407161316788 + ... + 407161318419.

Almost surely, 2^{664487270328912} is an apocalyptic number.

It is an amenable number.

664487270328912 is an abundant number, since it is smaller than the sum of its proper divisors (1153080851455344).

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

664487270328912 is a wasteful number, since it uses less digits than its factorization.

664487270328912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814322635235 (or 814322635229 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 69.

The spelling of 664487270328912 in words is "six hundred sixty-four trillion, four hundred eighty-seven billion, two hundred seventy million, three hundred twenty-eight thousand, nine hundred twelve".