686686485 has 16 divisors (see below), whose sum is σ = 1099296000. Its totient is φ = 366033600.

The previous prime is 686686471. The next prime is 686686489. The reversal of 686686485 is 584686686.

It is not a de Polignac number, because 686686485 - 2⁵ = 686686453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686686489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18535 + ... + 41435.

It is an arithmetic number, because the mean of its divisors is an integer number (68706000).

Almost surely, 2^686686485 is an apocalyptic number.

It is an amenable number.

686686485 is a deficient number, since it is larger than the sum of its proper divisors (412609515).

686686485 is a wasteful number, since it uses less digits than its factorization.

686686485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24908.

The product of its digits is 13271040, while the sum is 57.

The square root of 686686485 is about 26204.7034900225. The cubic root of 686686485 is about 882.2388262709.

The spelling of 686686485 in words is "six hundred eighty-six million, six hundred eighty-six thousand, four hundred eighty-five".