266240174797 has 2 divisors, whose sum is σ = 266240174798. Its totient is φ = 266240174796.

The previous prime is 266240174791. The next prime is 266240174813. The reversal of 266240174797 is 797471042662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145171668196 + 121068506601 = 381014^2 + 347949^2 .

It is a cyclic number.

It is not a de Polignac number, because 266240174797 - 2²⁷ = 266105957069 is a prime.

It is a super-2 number, since 2×266240174797² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266240174791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133120087398 + 133120087399.

It is an arithmetic number, because the mean of its divisors is an integer number (133120087399).

Almost surely, 2^266240174797 is an apocalyptic number.

It is an amenable number.

266240174797 is a deficient number, since it is larger than the sum of its proper divisors (1).

266240174797 is an equidigital number, since it uses as much as digits as its factorization.

266240174797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 55.

The spelling of 266240174797 in words is "two hundred sixty-six billion, two hundred forty million, one hundred seventy-four thousand, seven hundred ninety-seven".