266961391169 has 12 divisors (see below), whose sum is σ = 293459959380. Its totient is φ = 242673103200.

The previous prime is 266961391157. The next prime is 266961391171. The reversal of 266961391169 is 961193169662.

It can be written as a sum of positive squares in 2 ways, for example, as 62168939569 + 204792451600 = 249337^2 + 452540^2 .

It is not a de Polignac number, because 266961391169 - 2²⁸ = 266692955713 is a prime.

It is a super-2 number, since 2×266961391169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266961393169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1593539 + ... + 1753079.

It is an arithmetic number, because the mean of its divisors is an integer number (24454996615).

Almost surely, 2^266961391169 is an apocalyptic number.

It is an amenable number.

266961391169 is a deficient number, since it is larger than the sum of its proper divisors (26498568211).

266961391169 is a wasteful number, since it uses less digits than its factorization.

266961391169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173392 (or 173381 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 59.

The spelling of 266961391169 in words is "two hundred sixty-six billion, nine hundred sixty-one million, three hundred ninety-one thousand, one hundred sixty-nine".