266565271161 has 64 divisors (see below), whose sum is σ = 417374208000. Its totient is φ = 148201353216.

The previous prime is 266565271157. The next prime is 266565271171. The reversal of 266565271161 is 161172565662.

It is not a de Polignac number, because 266565271161 - 2² = 266565271157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 266565271161.

It is not an unprimeable number, because it can be changed into a prime (266565271171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34845865 + ... + 34853513.

It is an arithmetic number, because the mean of its divisors is an integer number (6521472000).

Almost surely, 2^266565271161 is an apocalyptic number.

266565271161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

266565271161 is a deficient number, since it is larger than the sum of its proper divisors (150808936839).

266565271161 is a wasteful number, since it uses less digits than its factorization.

266565271161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8038.

The product of its digits is 907200, while the sum is 48.

The spelling of 266565271161 in words is "two hundred sixty-six billion, five hundred sixty-five million, two hundred seventy-one thousand, one hundred sixty-one".