266796448181 has 2 divisors, whose sum is σ = 266796448182. Its totient is φ = 266796448180.

The previous prime is 266796448157. The next prime is 266796448253. The reversal of 266796448181 is 181844697662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249495255025 + 17301193156 = 499495^2 + 131534^2 .

It is a cyclic number.

It is not a de Polignac number, because 266796448181 - 2¹⁸ = 266796186037 is a prime.

It is a super-2 number, since 2×266796448181² (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 (266796448151) 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, 133398224090 + 133398224091.

It is an arithmetic number, because the mean of its divisors is an integer number (133398224091).

Almost surely, 2^266796448181 is an apocalyptic number.

It is an amenable number.

266796448181 is a deficient number, since it is larger than the sum of its proper divisors (1).

266796448181 is an equidigital number, since it uses as much as digits as its factorization.

266796448181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 62.

The spelling of 266796448181 in words is "two hundred sixty-six billion, seven hundred ninety-six million, four hundred forty-eight thousand, one hundred eighty-one".