6728668 has 24 divisors (see below), whose sum is σ = 12709872. Its totient is φ = 3105024.

The previous prime is 6728663. The next prime is 6728713. The reversal of 6728668 is 8668276.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2671 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (529578).

Almost surely, 2^6728668 is an apocalyptic number.

6728668 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6728668 is a deficient number, since it is larger than the sum of its proper divisors (5981204).

6728668 is a wasteful number, since it uses less digits than its factorization.

6728668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 1939 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 6728668 is about 2593.9676173769. The cubic root of 6728668 is about 188.7888612001.

It can be divided in two parts, 6728 and 668, that added together give a square (7396 = 86²).

The spelling of 6728668 in words is "six million, seven hundred twenty-eight thousand, six hundred sixty-eight".