266195151617 has 2 divisors, whose sum is σ = 266195151618. Its totient is φ = 266195151616.

The previous prime is 266195151613. The next prime is 266195151631. The reversal of 266195151617 is 716151591662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266182733041 + 12418576 = 515929^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 266195151617 - 2² = 266195151613 is a prime.

It is not a weakly prime, because it can be changed into another prime (266195151613) 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, 133097575808 + 133097575809.

It is an arithmetic number, because the mean of its divisors is an integer number (133097575809).

Almost surely, 2^266195151617 is an apocalyptic number.

It is an amenable number.

266195151617 is a deficient number, since it is larger than the sum of its proper divisors (1).

266195151617 is an equidigital number, since it uses as much as digits as its factorization.

266195151617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 50.

The spelling of 266195151617 in words is "two hundred sixty-six billion, one hundred ninety-five million, one hundred fifty-one thousand, six hundred seventeen".