6664443259 has 2 divisors, whose sum is σ = 6664443260. Its totient is φ = 6664443258.

The previous prime is 6664443221. The next prime is 6664443283. The reversal of 6664443259 is 9523444666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6664443259 - 2⁹ = 6664442747 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664443659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332221629 + 3332221630.

It is an arithmetic number, because the mean of its divisors is an integer number (3332221630).

Almost surely, 2^6664443259 is an apocalyptic number.

6664443259 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664443259 is an equidigital number, since it uses as much as digits as its factorization.

6664443259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 49.

The square root of 6664443259 is about 81636.0414216662. The cubic root of 6664443259 is about 1881.8628038254.

The spelling of 6664443259 in words is "six billion, six hundred sixty-four million, four hundred forty-three thousand, two hundred fifty-nine".