266745613 has 2 divisors, whose sum is σ = 266745614. Its totient is φ = 266745612.

The previous prime is 266745599. The next prime is 266745637. The reversal of 266745613 is 316547662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192044164 + 74701449 = 13858^2 + 8643^2 .

It is a cyclic number.

It is not a de Polignac number, because 266745613 - 2⁵ = 266745581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266745643) 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, 133372806 + 133372807.

It is an arithmetic number, because the mean of its divisors is an integer number (133372807).

Almost surely, 2^266745613 is an apocalyptic number.

It is an amenable number.

266745613 is a deficient number, since it is larger than the sum of its proper divisors (1).

266745613 is an equidigital number, since it uses as much as digits as its factorization.

266745613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 266745613 is about 16332.3486675983. The cubic root of 266745613 is about 643.7231016756.

The spelling of 266745613 in words is "two hundred sixty-six million, seven hundred forty-five thousand, six hundred thirteen".