266779548713 has 2 divisors, whose sum is σ = 266779548714. Its totient is φ = 266779548712.

The previous prime is 266779548667. The next prime is 266779548719. The reversal of 266779548713 is 317845977662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226720727104 + 40058821609 = 476152^2 + 200147^2 .

It is a cyclic number.

It is not a de Polignac number, because 266779548713 - 2¹² = 266779544617 is a prime.

It is a super-2 number, since 2×266779548713² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266779548713.

It is not a weakly prime, because it can be changed into another prime (266779548719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133389774356 + 133389774357.

It is an arithmetic number, because the mean of its divisors is an integer number (133389774357).

Almost surely, 2^266779548713 is an apocalyptic number.

It is an amenable number.

266779548713 is a deficient number, since it is larger than the sum of its proper divisors (1).

266779548713 is an equidigital number, since it uses as much as digits as its factorization.

266779548713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 65.

The spelling of 266779548713 in words is "two hundred sixty-six billion, seven hundred seventy-nine million, five hundred forty-eight thousand, seven hundred thirteen".