6639683 has 8 divisors (see below), whose sum is σ = 7108800. Its totient is φ = 6182568.

The previous prime is 6639679. The next prime is 6639697. The reversal of 6639683 is 3869366.

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

It is a cyclic number.

It is not a de Polignac number, because 6639683 - 2² = 6639679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6639683.

It is not an unprimeable number, because it can be changed into a prime (6639653) 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, 1841 + ... + 4082.

It is an arithmetic number, because the mean of its divisors is an integer number (888600).

Almost surely, 2^6639683 is an apocalyptic number.

6639683 is a deficient number, since it is larger than the sum of its proper divisors (469117).

6639683 is a wasteful number, since it uses less digits than its factorization.

6639683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001.

The product of its digits is 139968, while the sum is 41.

The square root of 6639683 is about 2576.7582346817. The cubic root of 6639683 is about 187.9529363857.

The spelling of 6639683 in words is "six million, six hundred thirty-nine thousand, six hundred eighty-three".