677640568 has 32 divisors (see below), whose sum is σ = 1396080000. Its totient is φ = 305796960.

The previous prime is 677640511. The next prime is 677640589. The reversal of 677640568 is 865046776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15468 + ... + 39931.

It is an arithmetic number, because the mean of its divisors is an integer number (43627500).

Almost surely, 2^677640568 is an apocalyptic number.

It is an amenable number.

677640568 is an abundant number, since it is smaller than the sum of its proper divisors (718439432).

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

677640568 is a wasteful number, since it uses less digits than its factorization.

677640568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555 (or 55551 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 677640568 is about 26031.5302661983. The cubic root of 677640568 is about 878.3476949965.

The spelling of 677640568 in words is "six hundred seventy-seven million, six hundred forty thousand, five hundred sixty-eight".