266782223173 has 2 divisors, whose sum is σ = 266782223174. Its totient is φ = 266782223172.

The previous prime is 266782223161. The next prime is 266782223189. The reversal of 266782223173 is 371322287662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146090599524 + 120691623649 = 382218^2 + 347407^2 .

It is a cyclic number.

It is not a de Polignac number, because 266782223173 - 2¹³ = 266782214981 is a prime.

It is a super-2 number, since 2×266782223173² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266782223573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133391111586 + 133391111587.

It is an arithmetic number, because the mean of its divisors is an integer number (133391111587).

Almost surely, 2^266782223173 is an apocalyptic number.

It is an amenable number.

266782223173 is a deficient number, since it is larger than the sum of its proper divisors (1).

266782223173 is an equidigital number, since it uses as much as digits as its factorization.

266782223173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 49.

The spelling of 266782223173 in words is "two hundred sixty-six billion, seven hundred eighty-two million, two hundred twenty-three thousand, one hundred seventy-three".