266886 has 12 divisors (see below), whose sum is σ = 578292. Its totient is φ = 88956.

The previous prime is 266867. The next prime is 266891. The reversal of 266886 is 688662.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 266886.

It is a congruent number.

It is an unprimeable number.

266886 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7396 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (48191).

2²⁶⁶⁸⁸⁶ is an apocalyptic number.

266886 is an abundant number, since it is smaller than the sum of its proper divisors (311406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266886 is a wasteful number, since it uses less digits than its factorization.

266886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14835 (or 14832 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 266886 is about 516.6101044308. The cubic root of 266886 is about 64.3836011381.

The spelling of 266886 in words is "two hundred sixty-six thousand, eight hundred eighty-six".