266544435132097 has 2 divisors, whose sum is σ = 266544435132098. Its totient is φ = 266544435132096.

The previous prime is 266544435132043. The next prime is 266544435132191. The reversal of 266544435132097 is 790231534445662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164464106814736 + 102080328317361 = 12824356^2 + 10103481^2 .

It is a cyclic number.

It is not a de Polignac number, because 266544435132097 - 2⁷ = 266544435131969 is a prime.

It is not a weakly prime, because it can be changed into another prime (266544435132797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133272217566048 + 133272217566049.

It is an arithmetic number, because the mean of its divisors is an integer number (133272217566049).

Almost surely, 2^{266544435132097} is an apocalyptic number.

It is an amenable number.

266544435132097 is a deficient number, since it is larger than the sum of its proper divisors (1).

266544435132097 is an equidigital number, since it uses as much as digits as its factorization.

266544435132097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130636800, while the sum is 61.

The spelling of 266544435132097 in words is "two hundred sixty-six trillion, five hundred forty-four billion, four hundred thirty-five million, one hundred thirty-two thousand, ninety-seven".