266855 has 12 divisors (see below), whose sum is σ = 343560. Its totient is φ = 198432.

The previous prime is 266839. The next prime is 266863. The reversal of 266855 is 558662.

It is a happy number.

It is not a de Polignac number, because 266855 - 2⁴ = 266839 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5009 + ... + 5061.

It is an arithmetic number, because the mean of its divisors is an integer number (28630).

2²⁶⁶⁸⁵⁵ is an apocalyptic number.

266855 is a deficient number, since it is larger than the sum of its proper divisors (76705).

266855 is an equidigital number, since it uses as much as digits as its factorization.

266855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 77 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 266855 is about 516.5801002749. The cubic root of 266855 is about 64.3811082274.

The spelling of 266855 in words is "two hundred sixty-six thousand, eight hundred fifty-five".