266352268781 has 2 divisors, whose sum is σ = 266352268782. Its totient is φ = 266352268780.

The previous prime is 266352268753. The next prime is 266352268879. The reversal of 266352268781 is 187862253662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246552964681 + 19799304100 = 496541^2 + 140710^2 .

It is a cyclic number.

It is not a de Polignac number, because 266352268781 - 2⁶ = 266352268717 is a prime.

It is a super-2 number, since 2×266352268781² (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 (266352264781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133176134390 + 133176134391.

It is an arithmetic number, because the mean of its divisors is an integer number (133176134391).

Almost surely, 2^266352268781 is an apocalyptic number.

It is an amenable number.

266352268781 is a deficient number, since it is larger than the sum of its proper divisors (1).

266352268781 is an equidigital number, since it uses as much as digits as its factorization.

266352268781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 56.

The spelling of 266352268781 in words is "two hundred sixty-six billion, three hundred fifty-two million, two hundred sixty-eight thousand, seven hundred eighty-one".