6686744 has 16 divisors (see below), whose sum is σ = 13083120. Its totient is φ = 3197920.

The previous prime is 6686723. The next prime is 6686747. The reversal of 6686744 is 4476866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17987 + ... + 18354.

It is an arithmetic number, because the mean of its divisors is an integer number (817695).

Almost surely, 2^6686744 is an apocalyptic number.

It is an amenable number.

6686744 is a deficient number, since it is larger than the sum of its proper divisors (6396376).

6686744 is a wasteful number, since it uses less digits than its factorization.

6686744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36370 (or 36366 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 6686744 is about 2585.8739335087. The cubic root of 6686744 is about 188.3959513677.

The spelling of 6686744 in words is "six million, six hundred eighty-six thousand, seven hundred forty-four".