686081358313668 has 48 divisors (see below), whose sum is σ = 1778731267488000. Its totient is φ = 228693552103584.

The previous prime is 686081358313633. The next prime is 686081358313751. The reversal of 686081358313668 is 866313853180686.

686081358313668 is a `hidden beast` number, since 6 + 8 + 6 + 0 + 8 + 1 + 3 + 583 + 1 + 36 + 6 + 8 = 666.

It is a super-2 number, since 2×686081358313668² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686081358313596 and 686081358313605.

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, 126753493 + ... + 132055331.

It is an arithmetic number, because the mean of its divisors is an integer number (37056901406000).

Almost surely, 2^{686081358313668} is an apocalyptic number.

It is an amenable number.

686081358313668 is an abundant number, since it is smaller than the sum of its proper divisors (1092649909174332).

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

686081358313668 is a wasteful number, since it uses less digits than its factorization.

686081358313668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500041 (or 6500033 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 72.

The spelling of 686081358313668 in words is "six hundred eighty-six trillion, eighty-one billion, three hundred fifty-eight million, three hundred thirteen thousand, six hundred sixty-eight".