6688694 has 8 divisors (see below), whose sum is σ = 10052328. Its totient is φ = 3337920.

The previous prime is 6688691. The next prime is 6688723. The reversal of 6688694 is 4968866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787 + ... + 4070.

It is an arithmetic number, because the mean of its divisors is an integer number (1256541).

Almost surely, 2^6688694 is an apocalyptic number.

6688694 is a deficient number, since it is larger than the sum of its proper divisors (3363634).

6688694 is a wasteful number, since it uses less digits than its factorization.

6688694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430.

The product of its digits is 497664, while the sum is 47.

The square root of 6688694 is about 2586.2509545672. The cubic root of 6688694 is about 188.4142630403.

The spelling of 6688694 in words is "six million, six hundred eighty-eight thousand, six hundred ninety-four".