266085889 has 2 divisors, whose sum is σ = 266085890. Its totient is φ = 266085888.

The previous prime is 266085871. The next prime is 266085901. The reversal of 266085889 is 988580662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246238864 + 19847025 = 15692^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 266085889 - 2⁵ = 266085857 is a prime.

It is not a weakly prime, because it can be changed into another prime (266085829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133042944 + 133042945.

It is an arithmetic number, because the mean of its divisors is an integer number (133042945).

Almost surely, 2^266085889 is an apocalyptic number.

It is an amenable number.

266085889 is a deficient number, since it is larger than the sum of its proper divisors (1).

266085889 is an equidigital number, since it uses as much as digits as its factorization.

266085889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 266085889 is about 16312.1393140201. The cubic root of 266085889 is about 643.1919712013.

The spelling of 266085889 in words is "two hundred sixty-six million, eighty-five thousand, eight hundred eighty-nine".