686614676 has 48 divisors (see below), whose sum is σ = 1372049280. Its totient is φ = 297601920.

The previous prime is 686614637. The next prime is 686614693. The reversal of 686614676 is 676416686.

It is a happy number.

It is a congruent number.

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, 400910 + ... + 402618.

It is an arithmetic number, because the mean of its divisors is an integer number (28584360).

Almost surely, 2^686614676 is an apocalyptic number.

It is an amenable number.

686614676 is a deficient number, since it is larger than the sum of its proper divisors (685434604).

686614676 is a wasteful number, since it uses less digits than its factorization.

686614676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144 (or 2142 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 686614676 is about 26203.3332994106. Note that the first 3 decimals coincide. The cubic root of 686614676 is about 882.2080723545.

It can be divided in two parts, 68661 and 4676, that added together give a palindrome (73337).

The spelling of 686614676 in words is "six hundred eighty-six million, six hundred fourteen thousand, six hundred seventy-six".