680618776 has 8 divisors (see below), whose sum is σ = 1276160220. Its totient is φ = 340309384.

The previous prime is 680618773. The next prime is 680618789. The reversal of 680618776 is 677816086.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680618773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42538666 + ... + 42538681.

Almost surely, 2^680618776 is an apocalyptic number.

It is an amenable number.

680618776 is a deficient number, since it is larger than the sum of its proper divisors (595541444).

680618776 is a wasteful number, since it uses less digits than its factorization.

680618776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85077353 (or 85077349 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 680618776 is about 26088.6714111700. The cubic root of 680618776 is about 879.6325842220.

The spelling of 680618776 in words is "six hundred eighty million, six hundred eighteen thousand, seven hundred seventy-six".