66789354239 has 2 divisors, whose sum is σ = 66789354240. Its totient is φ = 66789354238.

The previous prime is 66789354223. The next prime is 66789354259. The reversal of 66789354239 is 93245398766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66789354239 - 2⁴ = 66789354223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66789354209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33394677119 + 33394677120.

It is an arithmetic number, because the mean of its divisors is an integer number (33394677120).

Almost surely, 2^66789354239 is an apocalyptic number.

66789354239 is a deficient number, since it is larger than the sum of its proper divisors (1).

66789354239 is an equidigital number, since it uses as much as digits as its factorization.

66789354239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 62.

The spelling of 66789354239 in words is "sixty-six billion, seven hundred eighty-nine million, three hundred fifty-four thousand, two hundred thirty-nine".