266123656853 has 2 divisors, whose sum is σ = 266123656854. Its totient is φ = 266123656852.

The previous prime is 266123656831. The next prime is 266123656861. The reversal of 266123656853 is 358656321662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257923811044 + 8199845809 = 507862^2 + 90553^2 .

It is a cyclic number.

It is not a de Polignac number, because 266123656853 - 2³⁶ = 197404180117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 266123656795 and 266123656804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266123656873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133061828426 + 133061828427.

It is an arithmetic number, because the mean of its divisors is an integer number (133061828427).

Almost surely, 2^266123656853 is an apocalyptic number.

It is an amenable number.

266123656853 is a deficient number, since it is larger than the sum of its proper divisors (1).

266123656853 is an equidigital number, since it uses as much as digits as its factorization.

266123656853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 53.

The spelling of 266123656853 in words is "two hundred sixty-six billion, one hundred twenty-three million, six hundred fifty-six thousand, eight hundred fifty-three".