6668885539 has 2 divisors, whose sum is σ = 6668885540. Its totient is φ = 6668885538.

The previous prime is 6668885533. The next prime is 6668885549. The reversal of 6668885539 is 9355888666.

It is a happy number.

6668885539 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6668885539 - 2²⁹ = 6132014627 is a prime.

It is not a weakly prime, because it can be changed into another prime (6668885533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334442769 + 3334442770.

It is an arithmetic number, because the mean of its divisors is an integer number (3334442770).

Almost surely, 2^6668885539 is an apocalyptic number.

6668885539 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668885539 is an equidigital number, since it uses as much as digits as its factorization.

6668885539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74649600, while the sum is 64.

The square root of 6668885539 is about 81663.2447249067. The cubic root of 6668885539 is about 1882.2808384818.

The spelling of 6668885539 in words is "six billion, six hundred sixty-eight million, eight hundred eighty-five thousand, five hundred thirty-nine".