6643268 has 12 divisors (see below), whose sum is σ = 11773440. Its totient is φ = 3279432.

The previous prime is 6643261. The next prime is 6643283. The reversal of 6643268 is 8623466.

It is not an unprimeable number, because it can be changed into a prime (6643261) 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 3 ways as a sum of consecutive naturals, for example, 10196 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (981120).

Almost surely, 2^6643268 is an apocalyptic number.

It is an amenable number.

6643268 is a deficient number, since it is larger than the sum of its proper divisors (5130172).

6643268 is a wasteful number, since it uses less digits than its factorization.

6643268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21106 (or 21104 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 6643268 is about 2577.4537823208. The cubic root of 6643268 is about 187.9867577816.

It can be divided in two parts, 66 and 43268, that added together give a palindrome (43334).

The spelling of 6643268 in words is "six million, six hundred forty-three thousand, two hundred sixty-eight".