686008668 has 24 divisors (see below), whose sum is σ = 1601113360. Its totient is φ = 228608640.

The previous prime is 686008637. The next prime is 686008681. The reversal of 686008668 is 866800686.

686008668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×686008668² = 941215785142268448, which contains 22 as substring.

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, 76248 + ... + 84768.

Almost surely, 2^686008668 is an apocalyptic number.

It is an amenable number.

686008668 is an abundant number, since it is smaller than the sum of its proper divisors (915104692).

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

686008668 is a wasteful number, since it uses less digits than its factorization.

686008668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15237 (or 15235 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 686008668 is about 26191.7671797838. The cubic root of 686008668 is about 881.9484495351.

The spelling of 686008668 in words is "six hundred eighty-six million, eight thousand, six hundred sixty-eight".