6647646017 has 16 divisors (see below), whose sum is σ = 7450755840. Its totient is φ = 5900358912.

The previous prime is 6647646013. The next prime is 6647646041. The reversal of 6647646017 is 7106467466.

It is not a de Polignac number, because 6647646017 - 2² = 6647646013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647646013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135593 + ... + 177990.

It is an arithmetic number, because the mean of its divisors is an integer number (465672240).

Almost surely, 2^6647646017 is an apocalyptic number.

It is an amenable number.

6647646017 is a deficient number, since it is larger than the sum of its proper divisors (803109823).

6647646017 is a wasteful number, since it uses less digits than its factorization.

6647646017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313672.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The square root of 6647646017 is about 81533.0976781822. The cubic root of 6647646017 is about 1880.2804411317.

The spelling of 6647646017 in words is "six billion, six hundred forty-seven million, six hundred forty-six thousand, seventeen".