266311091 has 2 divisors, whose sum is σ = 266311092. Its totient is φ = 266311090.

The previous prime is 266311057. The next prime is 266311099. The reversal of 266311091 is 190113662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266311091 is a prime.

It is a super-2 number, since 2×266311091² = 141843194379220562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266311099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133155545 + 133155546.

It is an arithmetic number, because the mean of its divisors is an integer number (133155546).

Almost surely, 2^266311091 is an apocalyptic number.

266311091 is a deficient number, since it is larger than the sum of its proper divisors (1).

266311091 is an equidigital number, since it uses as much as digits as its factorization.

266311091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 266311091 is about 16319.0407499951. The cubic root of 266311091 is about 643.3733753761.

The spelling of 266311091 in words is "two hundred sixty-six million, three hundred eleven thousand, ninety-one".