66366475887133 has 2 divisors, whose sum is σ = 66366475887134. Its totient is φ = 66366475887132.

The previous prime is 66366475887113. The next prime is 66366475887163. The reversal of 66366475887133 is 33178857466366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66322569713689 + 43906173444 = 8143867^2 + 209538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66366475887133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66366475887113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33183237943566 + 33183237943567.

It is an arithmetic number, because the mean of its divisors is an integer number (33183237943567).

Almost surely, 2^{66366475887133} is an apocalyptic number.

It is an amenable number.

66366475887133 is a deficient number, since it is larger than the sum of its proper divisors (1).

66366475887133 is an equidigital number, since it uses as much as digits as its factorization.

66366475887133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2194698240, while the sum is 73.

The spelling of 66366475887133 in words is "sixty-six trillion, three hundred sixty-six billion, four hundred seventy-five million, eight hundred eighty-seven thousand, one hundred thirty-three".