680597664 has 24 divisors (see below), whose sum is σ = 1786569120. Its totient is φ = 226865856.

The previous prime is 680597657. The next prime is 680597681. The reversal of 680597664 is 466795086.

It is a tau number, because it is divible by the number of its divisors (24).

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, 3544684 + ... + 3544875.

It is an arithmetic number, because the mean of its divisors is an integer number (74440380).

Almost surely, 2^680597664 is an apocalyptic number.

It is an amenable number.

680597664 is an abundant number, since it is smaller than the sum of its proper divisors (1105971456).

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

680597664 is a wasteful number, since it uses less digits than its factorization.

680597664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089572 (or 7089564 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 680597664 is about 26088.2667879643. The cubic root of 680597664 is about 879.6234890693.

The spelling of 680597664 in words is "six hundred eighty million, five hundred ninety-seven thousand, six hundred sixty-four".