6626864543 has 16 divisors (see below), whose sum is σ = 7167061440. Its totient is φ = 6091083264.

The previous prime is 6626864533. The next prime is 6626864557. The reversal of 6626864543 is 3454686266.

It is a cyclic number.

It is not a de Polignac number, because 6626864543 - 2⁸ = 6626864287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6626864491 and 6626864500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6626864533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3876773 + ... + 3878481.

It is an arithmetic number, because the mean of its divisors is an integer number (447941340).

Almost surely, 2^6626864543 is an apocalyptic number.

6626864543 is a deficient number, since it is larger than the sum of its proper divisors (540196897).

6626864543 is a wasteful number, since it uses less digits than its factorization.

6626864543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818.

The product of its digits is 4976640, while the sum is 50.

The square root of 6626864543 is about 81405.5559713218. Note that the first 3 decimals coincide. The cubic root of 6626864543 is about 1878.3190557109.

The spelling of 6626864543 in words is "six billion, six hundred twenty-six million, eight hundred sixty-four thousand, five hundred forty-three".