66068869439 has 2 divisors, whose sum is σ = 66068869440. Its totient is φ = 66068869438.

The previous prime is 66068869429. The next prime is 66068869457. The reversal of 66068869439 is 93496886066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66068869439 - 2⁸ = 66068869183 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66068869429) 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, 33034434719 + 33034434720.

It is an arithmetic number, because the mean of its divisors is an integer number (33034434720).

Almost surely, 2^66068869439 is an apocalyptic number.

66068869439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66068869439 is an equidigital number, since it uses as much as digits as its factorization.

66068869439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80621568, while the sum is 65.

The spelling of 66068869439 in words is "sixty-six billion, sixty-eight million, eight hundred sixty-nine thousand, four hundred thirty-nine".