6664872 has 16 divisors (see below), whose sum is σ = 16662240. Its totient is φ = 2221616.

The previous prime is 6664859. The next prime is 6664873. The reversal of 6664872 is 2784666.

It is a self number, because there is not a number n which added to its sum of digits gives 6664872.

It is not an unprimeable number, because it can be changed into a prime (6664873) 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, 138828 + ... + 138875.

It is an arithmetic number, because the mean of its divisors is an integer number (1041390).

Almost surely, 2^6664872 is an apocalyptic number.

It is an amenable number.

6664872 is an abundant number, since it is smaller than the sum of its proper divisors (9997368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664872 is a wasteful number, since it uses less digits than its factorization.

6664872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277712 (or 277708 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 6664872 is about 2581.6413383737. The cubic root of 6664872 is about 188.1903158006.

The spelling of 6664872 in words is "six million, six hundred sixty-four thousand, eight hundred seventy-two".