6688942 has 16 divisors (see below), whose sum is σ = 10850112. Its totient is φ = 3074400.

The previous prime is 6688933. The next prime is 6688943. The reversal of 6688942 is 2498866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688943) 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, 9192 + ... + 9892.

It is an arithmetic number, because the mean of its divisors is an integer number (678132).

Almost surely, 2^6688942 is an apocalyptic number.

6688942 is a deficient number, since it is larger than the sum of its proper divisors (4161170).

6688942 is a wasteful number, since it uses less digits than its factorization.

6688942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083.

The product of its digits is 165888, while the sum is 43.

The square root of 6688942 is about 2586.2988999727. The cubic root of 6688942 is about 188.4165916543.

The spelling of 6688942 in words is "six million, six hundred eighty-eight thousand, nine hundred forty-two".