6645030811 has 2 divisors, whose sum is σ = 6645030812. Its totient is φ = 6645030810.

The previous prime is 6645030781. The next prime is 6645030827. The reversal of 6645030811 is 1180305466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6645030811 - 2²¹ = 6642933659 is a prime.

It is not a weakly prime, because it can be changed into another prime (6645030841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322515405 + 3322515406.

It is an arithmetic number, because the mean of its divisors is an integer number (3322515406).

Almost surely, 2^6645030811 is an apocalyptic number.

6645030811 is a deficient number, since it is larger than the sum of its proper divisors (1).

6645030811 is an equidigital number, since it uses as much as digits as its factorization.

6645030811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 6645030811 is about 81517.0584049744. The cubic root of 6645030811 is about 1880.0338392694.

The spelling of 6645030811 in words is "six billion, six hundred forty-five million, thirty thousand, eight hundred eleven".