6688963 has 8 divisors (see below), whose sum is σ = 6963200. Its totient is φ = 6418440.

The previous prime is 6688943. The next prime is 6688967. The reversal of 6688963 is 3698866.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6688963 is a prime.

It is a Duffinian number.

6688963 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6688967) 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, 3088 + ... + 4786.

It is an arithmetic number, because the mean of its divisors is an integer number (870400).

Almost surely, 2^6688963 is an apocalyptic number.

6688963 is a deficient number, since it is larger than the sum of its proper divisors (274237).

6688963 is a wasteful number, since it uses less digits than its factorization.

6688963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857.

The product of its digits is 373248, while the sum is 46.

The square root of 6688963 is about 2586.3029598251. The cubic root of 6688963 is about 188.4167888327.

The spelling of 6688963 in words is "six million, six hundred eighty-eight thousand, nine hundred sixty-three".