6564966808841 has 16 divisors (see below), whose sum is σ = 7542658176000. Its totient is φ = 5597251208208.

The previous prime is 6564966808837. The next prime is 6564966808889. The reversal of 6564966808841 is 1488086694656.

It is a cyclic number.

It is not a de Polignac number, because 6564966808841 - 2² = 6564966808837 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6564966808241) 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, 4263986 + ... + 5595668.

It is an arithmetic number, because the mean of its divisors is an integer number (471416136000).

Almost surely, 2^{6564966808841} is an apocalyptic number.

It is an amenable number.

6564966808841 is a deficient number, since it is larger than the sum of its proper divisors (977691367159).

6564966808841 is a wasteful number, since it uses less digits than its factorization.

6564966808841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335428.

The product of its (nonzero) digits is 477757440, while the sum is 71.

The spelling of 6564966808841 in words is "six trillion, five hundred sixty-four billion, nine hundred sixty-six million, eight hundred eight thousand, eight hundred forty-one".