266330161 has 2 divisors, whose sum is σ = 266330162. Its totient is φ = 266330160.

The previous prime is 266330149. The next prime is 266330167. The reversal of 266330161 is 161033662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144360225 + 121969936 = 12015^2 + 11044^2 .

It is a cyclic number.

It is not a de Polignac number, because 266330161 - 2¹⁵ = 266297393 is a prime.

It is not a weakly prime, because it can be changed into another prime (266330167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133165080 + 133165081.

It is an arithmetic number, because the mean of its divisors is an integer number (133165081).

Almost surely, 2^266330161 is an apocalyptic number.

It is an amenable number.

266330161 is a deficient number, since it is larger than the sum of its proper divisors (1).

266330161 is an equidigital number, since it uses as much as digits as its factorization.

266330161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 266330161 is about 16319.6250263295. The cubic root of 266330161 is about 643.3887318994.

The spelling of 266330161 in words is "two hundred sixty-six million, three hundred thirty thousand, one hundred sixty-one".