66789354259 has 2 divisors, whose sum is σ = 66789354260. Its totient is φ = 66789354258.

The previous prime is 66789354239. The next prime is 66789354283. The reversal of 66789354259 is 95245398766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66789354259 - 2⁷ = 66789354131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66789354259.

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, 33394677129 + 33394677130.

It is an arithmetic number, because the mean of its divisors is an integer number (33394677130).

Almost surely, 2^66789354259 is an apocalyptic number.

66789354259 is a deficient number, since it is larger than the sum of its proper divisors (1).

66789354259 is an equidigital number, since it uses as much as digits as its factorization.

66789354259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 64.

The spelling of 66789354259 in words is "sixty-six billion, seven hundred eighty-nine million, three hundred fifty-four thousand, two hundred fifty-nine".