266889 has 16 divisors (see below), whose sum is σ = 414720. Its totient is φ = 149520.

The previous prime is 266867. The next prime is 266891. The reversal of 266889 is 988662.

It is not a de Polignac number, because 266889 - 2⁸ = 266633 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (266839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1402 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (25920).

2²⁶⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

266889 is a deficient number, since it is larger than the sum of its proper divisors (147831).

266889 is a wasteful number, since it uses less digits than its factorization.

266889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 41472, while the sum is 39.

The square root of 266889 is about 516.6130079663. The cubic root of 266889 is about 64.3838423773.

The spelling of 266889 in words is "two hundred sixty-six thousand, eight hundred eighty-nine".