66439122059 has 2 divisors, whose sum is σ = 66439122060. Its totient is φ = 66439122058.

The previous prime is 66439122053. The next prime is 66439122083. The reversal of 66439122059 is 95022193466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66439122059 - 2²⁰ = 66438073483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66439122053) 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, 33219561029 + 33219561030.

It is an arithmetic number, because the mean of its divisors is an integer number (33219561030).

Almost surely, 2^66439122059 is an apocalyptic number.

66439122059 is a deficient number, since it is larger than the sum of its proper divisors (1).

66439122059 is an equidigital number, since it uses as much as digits as its factorization.

66439122059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 66439122059 in words is "sixty-six billion, four hundred thirty-nine million, one hundred twenty-two thousand, fifty-nine".