266450161 has 2 divisors, whose sum is σ = 266450162. Its totient is φ = 266450160.

The previous prime is 266450153. The next prime is 266450189. The reversal of 266450161 is 161054662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167547136 + 98903025 = 12944^2 + 9945^2 .

It is a cyclic number.

It is not a de Polignac number, because 266450161 - 2³ = 266450153 is a prime.

It is not a weakly prime, because it can be changed into another prime (266450111) 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, 133225080 + 133225081.

It is an arithmetic number, because the mean of its divisors is an integer number (133225081).

Almost surely, 2^266450161 is an apocalyptic number.

It is an amenable number.

266450161 is a deficient number, since it is larger than the sum of its proper divisors (1).

266450161 is an equidigital number, since it uses as much as digits as its factorization.

266450161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 266450161 is about 16323.3011673497. The cubic root of 266450161 is about 643.4853476373.

It can be divided in two parts, 2664 and 50161, that added together give a palindrome (52825).

The spelling of 266450161 in words is "two hundred sixty-six million, four hundred fifty thousand, one hundred sixty-one".