266696382917 has 2 divisors, whose sum is σ = 266696382918. Its totient is φ = 266696382916.

The previous prime is 266696382871. The next prime is 266696382919. The reversal of 266696382917 is 719283696662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263539516321 + 3156866596 = 513361^2 + 56186^2 .

It is a cyclic number.

It is not a de Polignac number, because 266696382917 - 2¹⁴ = 266696366533 is a prime.

It is a super-2 number, since 2×266696382917² (a number of 24 digits) contains 22 as substring.

Together with 266696382919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266696382919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133348191458 + 133348191459.

It is an arithmetic number, because the mean of its divisors is an integer number (133348191459).

Almost surely, 2^266696382917 is an apocalyptic number.

It is an amenable number.

266696382917 is a deficient number, since it is larger than the sum of its proper divisors (1).

266696382917 is an equidigital number, since it uses as much as digits as its factorization.

266696382917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70543872, while the sum is 65.

The spelling of 266696382917 in words is "two hundred sixty-six billion, six hundred ninety-six million, three hundred eighty-two thousand, nine hundred seventeen".