6688930 has 16 divisors (see below), whose sum is σ = 12193920. Its totient is φ = 2641392.

The previous prime is 6688919. The next prime is 6688933. The reversal of 6688930 is 398866.

It is not an unprimeable number, because it can be changed into a prime (6688933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3444 + ... + 5023.

It is an arithmetic number, because the mean of its divisors is an integer number (762120).

Almost surely, 2^6688930 is an apocalyptic number.

6688930 is a deficient number, since it is larger than the sum of its proper divisors (5504990).

6688930 is a wasteful number, since it uses less digits than its factorization.

6688930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 6688930 is about 2586.2965800542. The cubic root of 6688930 is about 188.4164789807.

Subtracting from 6688930 its reverse (398866), we obtain a square (6290064 = 2508²).

The spelling of 6688930 in words is "six million, six hundred eighty-eight thousand, nine hundred thirty".