266263091 has 2 divisors, whose sum is σ = 266263092. Its totient is φ = 266263090.

The previous prime is 266263079. The next prime is 266263099. The reversal of 266263091 is 190362662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266263091 - 2¹⁸ = 266000947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266263099) 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, 133131545 + 133131546.

It is an arithmetic number, because the mean of its divisors is an integer number (133131546).

Almost surely, 2^266263091 is an apocalyptic number.

266263091 is a deficient number, since it is larger than the sum of its proper divisors (1).

266263091 is an equidigital number, since it uses as much as digits as its factorization.

266263091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 266263091 is about 16317.5700090424. The cubic root of 266263091 is about 643.3347191095.

The spelling of 266263091 in words is "two hundred sixty-six million, two hundred sixty-three thousand, ninety-one".