6686670 has 32 divisors (see below), whose sum is σ = 16894080. Its totient is φ = 1689120.

The previous prime is 6686663. The next prime is 6686681. The reversal of 6686670 is 766866.

6686670 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 5296 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (527940).

Almost surely, 2^6686670 is an apocalyptic number.

6686670 is an abundant number, since it is smaller than the sum of its proper divisors (10207410).

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

6686670 is a wasteful number, since it uses less digits than its factorization.

6686670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11760.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 6686670 is about 2585.8596249603. The cubic root of 6686670 is about 188.3952563931.

It can be divided in two parts, 66 and 86670, that added together give a triangular number (86736 = T₄₁₆).

The spelling of 6686670 in words is "six million, six hundred eighty-six thousand, six hundred seventy".