266516662129 has 2 divisors, whose sum is σ = 266516662130. Its totient is φ = 266516662128.

The previous prime is 266516662063. The next prime is 266516662171. The reversal of 266516662129 is 921266615662.

266516662129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249023954529 + 17492707600 = 499023^2 + 132260^2 .

It is a cyclic number.

It is not a de Polignac number, because 266516662129 - 2³¹ = 264369178481 is a prime.

It is a super-2 number, since 2×266516662129² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266516662429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133258331064 + 133258331065.

It is an arithmetic number, because the mean of its divisors is an integer number (133258331065).

Almost surely, 2^266516662129 is an apocalyptic number.

It is an amenable number.

266516662129 is a deficient number, since it is larger than the sum of its proper divisors (1).

266516662129 is an equidigital number, since it uses as much as digits as its factorization.

266516662129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 52.

The spelling of 266516662129 in words is "two hundred sixty-six billion, five hundred sixteen million, six hundred sixty-two thousand, one hundred twenty-nine".