664785279360 has 96 divisors (see below), whose sum is σ = 2295586687680. Its totient is φ = 177276072960.

The previous prime is 664785279349. The next prime is 664785279373. The reversal of 664785279360 is 63972587466.

664785279360 is a `hidden beast` number, since 6 + 6 + 4 + 78 + 527 + 9 + 36 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57701296 + ... + 57712815.

It is an arithmetic number, because the mean of its divisors is an integer number (23912361330).

Almost surely, 2^664785279360 is an apocalyptic number.

664785279360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664785279360 is an abundant number, since it is smaller than the sum of its proper divisors (1630801408320).

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

664785279360 is a wasteful number, since it uses less digits than its factorization.

664785279360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115414136 (or 115414121 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 63.

The spelling of 664785279360 in words is "six hundred sixty-four billion, seven hundred eighty-five million, two hundred seventy-nine thousand, three hundred sixty".