6647017216 has 72 divisors (see below), whose sum is σ = 15205070720. Its totient is φ = 2840914944.

The previous prime is 6647017177. The next prime is 6647017229. The reversal of 6647017216 is 6127107466.

It is a congruent number.

It is an unprimeable number.

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, 674275 + ... + 684061.

Almost surely, 2^6647017216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6647017216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7602535360).

6647017216 is an abundant number, since it is smaller than the sum of its proper divisors (8558053504).

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

6647017216 is an equidigital number, since it uses as much as digits as its factorization.

6647017216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10189 (or 10175 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 6647017216 is about 81529.2414781347. The cubic root of 6647017216 is about 1880.2211540046.

The spelling of 6647017216 in words is "six billion, six hundred forty-seven million, seventeen thousand, two hundred sixteen".