66798139333 has 2 divisors, whose sum is σ = 66798139334. Its totient is φ = 66798139332.

The previous prime is 66798139313. The next prime is 66798139381. The reversal of 66798139333 is 33393189766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64020638529 + 2777500804 = 253023^2 + 52702^2 .

It is a cyclic number.

It is not a de Polignac number, because 66798139333 - 2⁹ = 66798138821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66798139313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33399069666 + 33399069667.

It is an arithmetic number, because the mean of its divisors is an integer number (33399069667).

Almost surely, 2^66798139333 is an apocalyptic number.

It is an amenable number.

66798139333 is a deficient number, since it is larger than the sum of its proper divisors (1).

66798139333 is an equidigital number, since it uses as much as digits as its factorization.

66798139333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 58.

The spelling of 66798139333 in words is "sixty-six billion, seven hundred ninety-eight million, one hundred thirty-nine thousand, three hundred thirty-three".