6688870 has 16 divisors (see below), whose sum is σ = 12428928. Its totient is φ = 2589120.

The previous prime is 6688859. The next prime is 6688907. The reversal of 6688870 is 788866.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10479 + ... + 11098.

It is an arithmetic number, because the mean of its divisors is an integer number (776808).

Almost surely, 2^6688870 is an apocalyptic number.

6688870 is a deficient number, since it is larger than the sum of its proper divisors (5740058).

6688870 is a wasteful number, since it uses less digits than its factorization.

6688870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21615.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 6688870 is about 2586.2849804304. The cubic root of 6688870 is about 188.4159156110.

The spelling of 6688870 in words is "six million, six hundred eighty-eight thousand, eight hundred seventy".