6689944 has 8 divisors (see below), whose sum is σ = 12543660. Its totient is φ = 3344968.

The previous prime is 6689909. The next prime is 6689971. The reversal of 6689944 is 4499866.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 6689894 and 6689903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418114 + ... + 418129.

Almost surely, 2^6689944 is an apocalyptic number.

It is an amenable number.

6689944 is a deficient number, since it is larger than the sum of its proper divisors (5853716).

6689944 is a wasteful number, since it uses less digits than its factorization.

6689944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836249 (or 836245 counting only the distinct ones).

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

The square root of 6689944 is about 2586.4926058274. The cubic root of 6689944 is about 188.4259994200.

The spelling of 6689944 in words is "six million, six hundred eighty-nine thousand, nine hundred forty-four".