686054976705 has 24 divisors (see below), whose sum is σ = 1359042240192. Its totient is φ = 313625132064.

The previous prime is 686054976703. The next prime is 686054976709. The reversal of 686054976705 is 507679450686.

686054976705 is a `hidden beast` number, since 6 + 86 + 0 + 5 + 497 + 67 + 0 + 5 = 666.

It is not a de Polignac number, because 686054976705 - 2¹ = 686054976703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (686054976701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1088975839 + ... + 1088976468.

It is an arithmetic number, because the mean of its divisors is an integer number (56626760008).

Almost surely, 2^686054976705 is an apocalyptic number.

It is an amenable number.

686054976705 is a deficient number, since it is larger than the sum of its proper divisors (672987263487).

686054976705 is a wasteful number, since it uses less digits than its factorization.

686054976705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177952325 (or 2177952322 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 686054976705 in words is "six hundred eighty-six billion, fifty-four million, nine hundred seventy-six thousand, seven hundred five".