686606568 has 16 divisors (see below), whose sum is σ = 1716516480. Its totient is φ = 228868848.

The previous prime is 686606563. The next prime is 686606579. The reversal of 686606568 is 865606686.

It is a self number, because there is not a number n which added to its sum of digits gives 686606568.

It is not an unprimeable number, because it can be changed into a prime (686606563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14304280 + ... + 14304327.

It is an arithmetic number, because the mean of its divisors is an integer number (107282280).

Almost surely, 2^686606568 is an apocalyptic number.

It is an amenable number.

686606568 is an abundant number, since it is smaller than the sum of its proper divisors (1029909912).

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

686606568 is a wasteful number, since it uses less digits than its factorization.

686606568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28608616 (or 28608612 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 686606568 is about 26203.1785858128. The cubic root of 686606568 is about 882.2045997754.

The spelling of 686606568 in words is "six hundred eighty-six million, six hundred six thousand, five hundred sixty-eight".