6689444 has 12 divisors (see below), whose sum is σ = 12322800. Its totient is φ = 3168648.

The previous prime is 6689429. The next prime is 6689491. The reversal of 6689444 is 4449866.

It is a super-2 number, since 2×6689444² = 89497322058272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43934 + ... + 44085.

It is an arithmetic number, because the mean of its divisors is an integer number (1026900).

Almost surely, 2^6689444 is an apocalyptic number.

It is an amenable number.

6689444 is a deficient number, since it is larger than the sum of its proper divisors (5633356).

6689444 is a wasteful number, since it uses less digits than its factorization.

6689444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88042 (or 88040 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 6689444 is about 2586.3959480327. The cubic root of 6689444 is about 188.4213050436.

The spelling of 6689444 in words is "six million, six hundred eighty-nine thousand, four hundred forty-four".