6647764311 has 16 divisors (see below), whose sum is σ = 9861580000. Its totient is φ = 4425974784.

The previous prime is 6647764283. The next prime is 6647764351. The reversal of 6647764311 is 1134677466.

6647764311 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6647764311 - 2⁹ = 6647763799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647764351) 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, 142186 + ... + 183063.

It is an arithmetic number, because the mean of its divisors is an integer number (616348750).

Almost surely, 2^6647764311 is an apocalyptic number.

6647764311 is a deficient number, since it is larger than the sum of its proper divisors (3213815689).

6647764311 is a wasteful number, since it uses less digits than its factorization.

6647764311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326015 (or 326009 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 6647764311 is about 81533.8231104123. The cubic root of 6647764311 is about 1880.2915941812.

The spelling of 6647764311 in words is "six billion, six hundred forty-seven million, seven hundred sixty-four thousand, three hundred eleven".