66011542234177 has 2 divisors, whose sum is σ = 66011542234178. Its totient is φ = 66011542234176.

The previous prime is 66011542234133. The next prime is 66011542234223. The reversal of 66011542234177 is 77143224511066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66010278858241 + 1263375936 = 8124671^2 + 35544^2 .

It is a cyclic number.

It is not a de Polignac number, because 66011542234177 - 2³¹ = 66009394750529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66011542234177.

It is not a weakly prime, because it can be changed into another prime (66011542234117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33005771117088 + 33005771117089.

It is an arithmetic number, because the mean of its divisors is an integer number (33005771117089).

Almost surely, 2^{66011542234177} is an apocalyptic number.

It is an amenable number.

66011542234177 is a deficient number, since it is larger than the sum of its proper divisors (1).

66011542234177 is an equidigital number, since it uses as much as digits as its factorization.

66011542234177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 66011542234177 in words is "sixty-six trillion, eleven billion, five hundred forty-two million, two hundred thirty-four thousand, one hundred seventy-seven".