266780113 has 2 divisors, whose sum is σ = 266780114. Its totient is φ = 266780112.

The previous prime is 266780093. The next prime is 266780117. The reversal of 266780113 is 311087662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145515969 + 121264144 = 12063^2 + 11012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266780113 is a prime.

It is not a weakly prime, because it can be changed into another prime (266780117) 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, 133390056 + 133390057.

It is an arithmetic number, because the mean of its divisors is an integer number (133390057).

Almost surely, 2^266780113 is an apocalyptic number.

It is an amenable number.

266780113 is a deficient number, since it is larger than the sum of its proper divisors (1).

266780113 is an equidigital number, since it uses as much as digits as its factorization.

266780113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 266780113 is about 16333.4048195715. The cubic root of 266780113 is about 643.7508528219.

The spelling of 266780113 in words is "two hundred sixty-six million, seven hundred eighty thousand, one hundred thirteen".