6686847 has 16 divisors (see below), whose sum is σ = 9972480. Its totient is φ = 4428216.

The previous prime is 6686843. The next prime is 6686857. The reversal of 6686847 is 7486866.

It is a happy number.

6686847 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6686847 - 2² = 6686843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686843) 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, 3768 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (623280).

Almost surely, 2^6686847 is an apocalyptic number.

6686847 is a deficient number, since it is larger than the sum of its proper divisors (3285633).

6686847 is a wasteful number, since it uses less digits than its factorization.

6686847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1653 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6686847 is about 2585.8938493295. The cubic root of 6686847 is about 188.3969186887.

The spelling of 6686847 in words is "six million, six hundred eighty-six thousand, eight hundred forty-seven".