6656744 has 32 divisors (see below), whose sum is σ = 13141920. Its totient is φ = 3157056.

The previous prime is 6656743. The next prime is 6656753. The reversal of 6656744 is 4476566.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6656698 and 6656707.

It is not an unprimeable number, because it can be changed into a prime (6656743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12467 + ... + 12989.

It is an arithmetic number, because the mean of its divisors is an integer number (410685).

Almost surely, 2^6656744 is an apocalyptic number.

It is an amenable number.

6656744 is a deficient number, since it is larger than the sum of its proper divisors (6485176).

6656744 is a wasteful number, since it uses less digits than its factorization.

6656744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 605 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 6656744 is about 2580.0666658054. The cubic root of 6656744 is about 188.1137835426.

The spelling of 6656744 in words is "six million, six hundred fifty-six thousand, seven hundred forty-four".