266370027281 has 2 divisors, whose sum is σ = 266370027282. Its totient is φ = 266370027280.

The previous prime is 266370027241. The next prime is 266370027293. The reversal of 266370027281 is 182720073662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266338566400 + 31460881 = 516080^2 + 5609^2 .

It is a cyclic number.

It is not a de Polignac number, because 266370027281 - 2²² = 266365832977 is a prime.

It is a super-2 number, since 2×266370027281² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (266370027241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133185013640 + 133185013641.

It is an arithmetic number, because the mean of its divisors is an integer number (133185013641).

Almost surely, 2^266370027281 is an apocalyptic number.

It is an amenable number.

266370027281 is a deficient number, since it is larger than the sum of its proper divisors (1).

266370027281 is an equidigital number, since it uses as much as digits as its factorization.

266370027281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 266370027281 in words is "two hundred sixty-six billion, three hundred seventy million, twenty-seven thousand, two hundred eighty-one".