686199334626 has 96 divisors (see below), whose sum is σ = 1692637914240. Its totient is φ = 199166936832.

The previous prime is 686199334567. The next prime is 686199334693. The reversal of 686199334626 is 626433991686.

It is a happy number.

686199334626 is a `hidden beast` number, since 6 + 8 + 619 + 9 + 3 + 3 + 4 + 6 + 2 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 704715 + ... + 1367121.

It is an arithmetic number, because the mean of its divisors is an integer number (17631644940).

Almost surely, 2^686199334626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686199334626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846318957120).

686199334626 is an abundant number, since it is smaller than the sum of its proper divisors (1006438579614).

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

686199334626 is a wasteful number, since it uses less digits than its factorization.

686199334626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662680 (or 662677 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 63.

The spelling of 686199334626 in words is "six hundred eighty-six billion, one hundred ninety-nine million, three hundred thirty-four thousand, six hundred twenty-six".