6642568 has 16 divisors (see below), whose sum is σ = 12579660. Its totient is φ = 3288000.

The previous prime is 6642553. The next prime is 6642593. The reversal of 6642568 is 8652466.

It can be written as a sum of positive squares in 2 ways, for example, as 4743684 + 1898884 = 2178^2 + 1378^2 .

It is an unprimeable number.

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, 3303 + ... + 4918.

Almost surely, 2^6642568 is an apocalyptic number.

It is an amenable number.

6642568 is a deficient number, since it is larger than the sum of its proper divisors (5937092).

6642568 is a wasteful number, since it uses less digits than its factorization.

6642568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8328 (or 8324 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 6642568 is about 2577.3179858139. The cubic root of 6642568 is about 187.9801548390.

The spelling of 6642568 in words is "six million, six hundred forty-two thousand, five hundred sixty-eight".