6644368 has 10 divisors (see below), whose sum is σ = 12873494. Its totient is φ = 3322176.

The previous prime is 6644359. The next prime is 6644371. The reversal of 6644368 is 8634466.

It can be written as a sum of positive squares in only one way, i.e., 3504384 + 3139984 = 1872^2 + 1772^2 .

It is a super-2 number, since 2×6644368² = 88295252238848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207621 + ... + 207652.

Almost surely, 2^6644368 is an apocalyptic number.

It is an amenable number.

6644368 is a deficient number, since it is larger than the sum of its proper divisors (6229126).

6644368 is a wasteful number, since it uses less digits than its factorization.

6644368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415281 (or 415275 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 6644368 is about 2577.6671623776. The cubic root of 6644368 is about 187.9971328973.

The spelling of 6644368 in words is "six million, six hundred forty-four thousand, three hundred sixty-eight".