680660884 has 6 divisors (see below), whose sum is σ = 1191156554. Its totient is φ = 340330440.

The previous prime is 680660863. The next prime is 680660887. The reversal of 680660884 is 488066086.

It can be written as a sum of positive squares in only one way, i.e., 677456784 + 3204100 = 26028^2 + 1790^2 .

It is a super-2 number, since 2×680660884² = 926598478015322912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680660887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85082607 + ... + 85082614.

Almost surely, 2^680660884 is an apocalyptic number.

It is an amenable number.

680660884 is a deficient number, since it is larger than the sum of its proper divisors (510495670).

680660884 is a wasteful number, since it uses less digits than its factorization.

680660884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170165225 (or 170165223 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 46.

The square root of 680660884 is about 26089.4784156372. The cubic root of 680660884 is about 879.6507239924.

The spelling of 680660884 in words is "six hundred eighty million, six hundred sixty thousand, eight hundred eighty-four".