6646872 has 16 divisors (see below), whose sum is σ = 16617240. Its totient is φ = 2215616.

The previous prime is 6646867. The next prime is 6646873. The reversal of 6646872 is 2786466.

It is a self number, because there is not a number n which added to its sum of digits gives 6646872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646873) 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, 138453 + ... + 138500.

Almost surely, 2^6646872 is an apocalyptic number.

It is an amenable number.

6646872 is an abundant number, since it is smaller than the sum of its proper divisors (9970368).

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

6646872 is a wasteful number, since it uses less digits than its factorization.

6646872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276962 (or 276958 counting only the distinct ones).

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

The square root of 6646872 is about 2578.1528271226. The cubic root of 6646872 is about 188.0207461638.

The spelling of 6646872 in words is "six million, six hundred forty-six thousand, eight hundred seventy-two".