686496694686 has 32 divisors (see below), whose sum is σ = 1500788798208. Its totient is φ = 207615714240.

The previous prime is 686496694669. The next prime is 686496694699.

686496694686 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10306231 + ... + 10372626.

It is an arithmetic number, because the mean of its divisors is an integer number (46899649944).

Almost surely, 2^686496694686 is an apocalyptic number.

686496694686 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

686496694686 is an abundant number, since it is smaller than the sum of its proper divisors (814292103522).

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

686496694686 is a wasteful number, since it uses less digits than its factorization.

686496694686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20679376.

The product of its digits is 3869835264, while the sum is 78.

The spelling of 686496694686 in words is "six hundred eighty-six billion, four hundred ninety-six million, six hundred ninety-four thousand, six hundred eighty-six".