680660523 has 16 divisors (see below), whose sum is σ = 1009254400. Its totient is φ = 453382920.

The previous prime is 680660483. The next prime is 680660527. The reversal of 680660523 is 325066086.

It is a de Polignac number, because none of the positive numbers 2^k-680660523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680660527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22998 + ... + 43476.

It is an arithmetic number, because the mean of its divisors is an integer number (63078400).

Almost surely, 2^680660523 is an apocalyptic number.

680660523 is a deficient number, since it is larger than the sum of its proper divisors (328593877).

680660523 is a wasteful number, since it uses less digits than its factorization.

680660523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21719 (or 21713 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 680660523 is about 26089.4714971385. The cubic root of 680660523 is about 879.6505684798.

The spelling of 680660523 in words is "six hundred eighty million, six hundred sixty thousand, five hundred twenty-three".