680687887 has 24 divisors (see below), whose sum is σ = 768643920. Its totient is φ = 597749760.

The previous prime is 680687881. The next prime is 680687933. The reversal of 680687887 is 788786086.

It is not a de Polignac number, because 680687887 - 2³ = 680687879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680687881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2648463 + ... + 2648719.

It is an arithmetic number, because the mean of its divisors is an integer number (32026830).

Almost surely, 2^680687887 is an apocalyptic number.

680687887 is a deficient number, since it is larger than the sum of its proper divisors (87956033).

680687887 is a wasteful number, since it uses less digits than its factorization.

680687887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 58.

The square root of 680687887 is about 26089.9959179759. The cubic root of 680687887 is about 879.6623562628.

The spelling of 680687887 in words is "six hundred eighty million, six hundred eighty-seven thousand, eight hundred eighty-seven".