6647768 has 16 divisors (see below), whose sum is σ = 12536160. Its totient is φ = 3304800.

The previous prime is 6647761. The next prime is 6647779. The reversal of 6647768 is 8677466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (783510).

Almost surely, 2^6647768 is an apocalyptic number.

It is an amenable number.

6647768 is a deficient number, since it is larger than the sum of its proper divisors (5888392).

6647768 is a wasteful number, since it uses less digits than its factorization.

6647768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778 (or 4774 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 6647768 is about 2578.3265890884. The cubic root of 6647768 is about 188.0291941987.

The spelling of 6647768 in words is "six million, six hundred forty-seven thousand, seven hundred sixty-eight".