664750635960 has 64 divisors (see below), whose sum is σ = 1994525844480. Its totient is φ = 177242486400.

The previous prime is 664750635917. The next prime is 664750635973. The reversal of 664750635960 is 69536057466.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 664750635960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505329 + ... + 1258911.

It is an arithmetic number, because the mean of its divisors is an integer number (31164466320).

Almost surely, 2^664750635960 is an apocalyptic number.

664750635960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664750635960 is an abundant number, since it is smaller than the sum of its proper divisors (1329775208520).

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

664750635960 is a wasteful number, since it uses less digits than its factorization.

664750635960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760948 (or 760944 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 57.

The spelling of 664750635960 in words is "six hundred sixty-four billion, seven hundred fifty million, six hundred thirty-five thousand, nine hundred sixty".