6815044664 has 32 divisors (see below), whose sum is σ = 12832035120. Its totient is φ = 3393202176.

The previous prime is 6815044651. The next prime is 6815044669. The reversal of 6815044664 is 4664405186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815044669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170904 + ... + 2174040.

Almost surely, 2^6815044664 is an apocalyptic number.

It is an amenable number.

6815044664 is a deficient number, since it is larger than the sum of its proper divisors (6016990456).

6815044664 is a wasteful number, since it uses less digits than its factorization.

6815044664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199 (or 4195 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The square root of 6815044664 is about 82553.2837868973. The cubic root of 6815044664 is about 1895.9326346780.

The spelling of 6815044664 in words is "six billion, eight hundred fifteen million, forty-four thousand, six hundred sixty-four".