66826079939 has 2 divisors, whose sum is σ = 66826079940. Its totient is φ = 66826079938.

The previous prime is 66826079933. The next prime is 66826080001. The reversal of 66826079939 is 93997062866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66826079939 - 2²⁴ = 66809302723 is a prime.

It is not a weakly prime, because it can be changed into another prime (66826079933) 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, 33413039969 + 33413039970.

It is an arithmetic number, because the mean of its divisors is an integer number (33413039970).

Almost surely, 2^66826079939 is an apocalyptic number.

66826079939 is a deficient number, since it is larger than the sum of its proper divisors (1).

66826079939 is an equidigital number, since it uses as much as digits as its factorization.

66826079939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52907904, while the sum is 65.

The spelling of 66826079939 in words is "sixty-six billion, eight hundred twenty-six million, seventy-nine thousand, nine hundred thirty-nine".