686706633604 has 6 divisors (see below), whose sum is σ = 1201736608814. Its totient is φ = 343353316800.

The previous prime is 686706633593. The next prime is 686706633623. The reversal of 686706633604 is 406336607686.

It can be written as a sum of positive squares in only one way, i.e., 350594252100 + 336112381504 = 592110^2 + 579752^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85838329197 + ... + 85838329204.

Almost surely, 2^686706633604 is an apocalyptic number.

It is an amenable number.

686706633604 is a deficient number, since it is larger than the sum of its proper divisors (515029975210).

686706633604 is a wasteful number, since it uses less digits than its factorization.

686706633604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171676658405 (or 171676658403 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 55.

The spelling of 686706633604 in words is "six hundred eighty-six billion, seven hundred six million, six hundred thirty-three thousand, six hundred four".