6647966 has 16 divisors (see below), whose sum is σ = 11206944. Its totient is φ = 2934624.

The previous prime is 6647959. The next prime is 6647983. The reversal of 6647966 is 6697466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4961 + ... + 6156.

It is an arithmetic number, because the mean of its divisors is an integer number (700434).

Almost surely, 2^6647966 is an apocalyptic number.

6647966 is a deficient number, since it is larger than the sum of its proper divisors (4558978).

6647966 is a wasteful number, since it uses less digits than its factorization.

6647966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155.

The product of its digits is 326592, while the sum is 44.

The square root of 6647966 is about 2578.3649858001. The cubic root of 6647966 is about 188.0310609611.

The spelling of 6647966 in words is "six million, six hundred forty-seven thousand, nine hundred sixty-six".