266972608954897 has 2 divisors, whose sum is σ = 266972608954898. Its totient is φ = 266972608954896.

The previous prime is 266972608954787. The next prime is 266972608954963. The reversal of 266972608954897 is 798459806279662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167975700775936 + 98996908178961 = 12960544^2 + 9949719^2 .

It is a cyclic number.

It is not a de Polignac number, because 266972608954897 - 2⁴⁷ = 126235120599569 is a prime.

It is not a weakly prime, because it can be changed into another prime (266972608954697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133486304477448 + 133486304477449.

It is an arithmetic number, because the mean of its divisors is an integer number (133486304477449).

Almost surely, 2^{266972608954897} is an apocalyptic number.

It is an amenable number.

266972608954897 is a deficient number, since it is larger than the sum of its proper divisors (1).

266972608954897 is an equidigital number, since it uses as much as digits as its factorization.

266972608954897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39504568320, while the sum is 88.

The spelling of 266972608954897 in words is "two hundred sixty-six trillion, nine hundred seventy-two billion, six hundred eight million, nine hundred fifty-four thousand, eight hundred ninety-seven".