6644816 has 20 divisors (see below), whose sum is σ = 13094400. Its totient is φ = 3265632.

The previous prime is 6644801. The next prime is 6644837. The reversal of 6644816 is 6184466.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 2576 + ... + 4463.

It is an arithmetic number, because the mean of its divisors is an integer number (654720).

Almost surely, 2^6644816 is an apocalyptic number.

It is an amenable number.

6644816 is a deficient number, since it is larger than the sum of its proper divisors (6449584).

6644816 is a wasteful number, since it uses less digits than its factorization.

6644816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106 (or 7100 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 6644816 is about 2577.7540611936. The cubic root of 6644816 is about 188.0013580708.

The spelling of 6644816 in words is "six million, six hundred forty-four thousand, eight hundred sixteen".