6728664 has 32 divisors (see below), whose sum is σ = 16885440. Its totient is φ = 2234400.

The previous prime is 6728663. The next prime is 6728713. The reversal of 6728664 is 4668276.

6728664 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11499 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (527670).

Almost surely, 2^6728664 is an apocalyptic number.

It is an amenable number.

6728664 is an abundant number, since it is smaller than the sum of its proper divisors (10156776).

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

6728664 is a wasteful number, since it uses less digits than its factorization.

6728664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1067 counting only the distinct ones).

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

The square root of 6728664 is about 2593.9668463571. The cubic root of 6728664 is about 188.7888237902.

The spelling of 6728664 in words is "six million, seven hundred twenty-eight thousand, six hundred sixty-four".