664762402671312 has 160 divisors (see below), whose sum is σ = 1902246198451200. Its totient is φ = 198364574453760.

The previous prime is 664762402671293. The next prime is 664762402671319. The reversal of 664762402671312 is 213176204267466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664762402671319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22420038 + ... + 42804005.

It is an arithmetic number, because the mean of its divisors is an integer number (11889038740320).

Almost surely, 2^{664762402671312} is an apocalyptic number.

It is an amenable number.

664762402671312 is an abundant number, since it is smaller than the sum of its proper divisors (1237483795779888).

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

664762402671312 is a wasteful number, since it uses less digits than its factorization.

664762402671312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65224361 (or 65224355 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 664762402671312 in words is "six hundred sixty-four trillion, seven hundred sixty-two billion, four hundred two million, six hundred seventy-one thousand, three hundred twelve".