6766813664 has 24 divisors (see below), whose sum is σ = 14346947160. Its totient is φ = 3123144576.

The previous prime is 6766813661. The next prime is 6766813681. The reversal of 6766813664 is 4663186676.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6766813661) 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, 8132774 + ... + 8133605.

It is an arithmetic number, because the mean of its divisors is an integer number (597789465).

Almost surely, 2^6766813664 is an apocalyptic number.

It is an amenable number.

6766813664 is an abundant number, since it is smaller than the sum of its proper divisors (7580133496).

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

6766813664 is a wasteful number, since it uses less digits than its factorization.

6766813664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16266402 (or 16266394 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The square root of 6766813664 is about 82260.6446850497. The cubic root of 6766813664 is about 1891.4494507255.

The spelling of 6766813664 in words is "six billion, seven hundred sixty-six million, eight hundred thirteen thousand, six hundred sixty-four".