266506013 has 2 divisors, whose sum is σ = 266506014. Its totient is φ = 266506012.

The previous prime is 266506001. The next prime is 266506049. The reversal of 266506013 is 310605662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148522969 + 117983044 = 12187^2 + 10862^2 .

It is a cyclic number.

It is not a de Polignac number, because 266506013 - 2⁴ = 266505997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266506073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133253006 + 133253007.

It is an arithmetic number, because the mean of its divisors is an integer number (133253007).

Almost surely, 2^266506013 is an apocalyptic number.

It is an amenable number.

266506013 is a deficient number, since it is larger than the sum of its proper divisors (1).

266506013 is an equidigital number, since it uses as much as digits as its factorization.

266506013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 266506013 is about 16325.0118836098. The cubic root of 266506013 is about 643.5303059297.

The spelling of 266506013 in words is "two hundred sixty-six million, five hundred six thousand, thirteen".