66342020279 has 2 divisors, whose sum is σ = 66342020280. Its totient is φ = 66342020278.

The previous prime is 66342020273. The next prime is 66342020291. The reversal of 66342020279 is 97202024366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66342020279 - 2²⁸ = 66073584823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66342020273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33171010139 + 33171010140.

It is an arithmetic number, because the mean of its divisors is an integer number (33171010140).

Almost surely, 2^66342020279 is an apocalyptic number.

66342020279 is a deficient number, since it is larger than the sum of its proper divisors (1).

66342020279 is an equidigital number, since it uses as much as digits as its factorization.

66342020279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 66342020279 in words is "sixty-six billion, three hundred forty-two million, twenty thousand, two hundred seventy-nine".