266591141 has 2 divisors, whose sum is σ = 266591142. Its totient is φ = 266591140.

The previous prime is 266591131. The next prime is 266591189. The reversal of 266591141 is 141195662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165508225 + 101082916 = 12865^2 + 10054^2 .

It is a cyclic number.

It is not a de Polignac number, because 266591141 - 2¹⁰ = 266590117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266591111) 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, 133295570 + 133295571.

It is an arithmetic number, because the mean of its divisors is an integer number (133295571).

Almost surely, 2^266591141 is an apocalyptic number.

It is an amenable number.

266591141 is a deficient number, since it is larger than the sum of its proper divisors (1).

266591141 is an equidigital number, since it uses as much as digits as its factorization.

266591141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 266591141 is about 16327.6189629719. The cubic root of 266591141 is about 643.5988179749.

The spelling of 266591141 in words is "two hundred sixty-six million, five hundred ninety-one thousand, one hundred forty-one".