6647744 has 28 divisors (see below), whose sum is σ = 13277088. Its totient is φ = 3302400.

The previous prime is 6647743. The next prime is 6647747. The reversal of 6647744 is 4477466.

6647744 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 6647698 and 6647707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15209 + ... + 15639.

Almost surely, 2^6647744 is an apocalyptic number.

6647744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6647744 is a deficient number, since it is larger than the sum of its proper divisors (6629344).

6647744 is a wasteful number, since it uses less digits than its factorization.

6647744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 674 counting only the distinct ones).

The product of its digits is 112896, while the sum is 38.

The square root of 6647744 is about 2578.3219349026. The cubic root of 6647744 is about 188.0289679220.

The spelling of 6647744 in words is "six million, six hundred forty-seven thousand, seven hundred forty-four".