6688744 has 16 divisors (see below), whose sum is σ = 12729600. Its totient is φ = 3294192.

The previous prime is 6688727. The next prime is 6688757. The reversal of 6688744 is 4478866.

It is a self number, because there is not a number n which added to its sum of digits gives 6688744.

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, 5704 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (795600).

Almost surely, 2^6688744 is an apocalyptic number.

It is an amenable number.

6688744 is a deficient number, since it is larger than the sum of its proper divisors (6040856).

6688744 is a wasteful number, since it uses less digits than its factorization.

6688744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12552 (or 12548 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 6688744 is about 2586.2606210512. The cubic root of 6688744 is about 188.4147325235.

The spelling of 6688744 in words is "six million, six hundred eighty-eight thousand, seven hundred forty-four".