266264320213 has 2 divisors, whose sum is σ = 266264320214. Its totient is φ = 266264320212.

The previous prime is 266264320187. The next prime is 266264320243. The reversal of 266264320213 is 312023462662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252447963364 + 13816356849 = 502442^2 + 117543^2 .

It is a cyclic number.

It is not a de Polignac number, because 266264320213 - 2¹⁷ = 266264189141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266264320243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133132160106 + 133132160107.

It is an arithmetic number, because the mean of its divisors is an integer number (133132160107).

Almost surely, 2^266264320213 is an apocalyptic number.

It is an amenable number.

266264320213 is a deficient number, since it is larger than the sum of its proper divisors (1).

266264320213 is an equidigital number, since it uses as much as digits as its factorization.

266264320213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 266264320213 its reverse (312023462662), we get a palindrome (578287782875).

The spelling of 266264320213 in words is "two hundred sixty-six billion, two hundred sixty-four million, three hundred twenty thousand, two hundred thirteen".