6686856 has 48 divisors (see below), whose sum is σ = 19758960. Its totient is φ = 2026080.

The previous prime is 6686843. The next prime is 6686857. The reversal of 6686856 is 6586866.

It is not an unprimeable number, because it can be changed into a prime (6686857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3430 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (411645).

Almost surely, 2^6686856 is an apocalyptic number.

6686856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6686856 is an abundant number, since it is smaller than the sum of its proper divisors (13072104).

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

6686856 is a wasteful number, since it uses less digits than its factorization.

6686856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8466 (or 8459 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 6686856 is about 2585.8955895395. The cubic root of 6686856 is about 188.3970032114.

The spelling of 6686856 in words is "six million, six hundred eighty-six thousand, eight hundred fifty-six".