266406913 has 2 divisors, whose sum is σ = 266406914. Its totient is φ = 266406912.

The previous prime is 266406893. The next prime is 266406929. The reversal of 266406913 is 319604662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262051344 + 4355569 = 16188^2 + 2087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266406913 is a prime.

It is not a weakly prime, because it can be changed into another prime (266406713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133203456 + 133203457.

It is an arithmetic number, because the mean of its divisors is an integer number (133203457).

Almost surely, 2^266406913 is an apocalyptic number.

It is an amenable number.

266406913 is a deficient number, since it is larger than the sum of its proper divisors (1).

266406913 is an equidigital number, since it uses as much as digits as its factorization.

266406913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 266406913 is about 16321.9763815538. The cubic root of 266406913 is about 643.4505306694.

The spelling of 266406913 in words is "two hundred sixty-six million, four hundred six thousand, nine hundred thirteen".