266858 has 16 divisors (see below), whose sum is σ = 427680. Its totient is φ = 124656.

The previous prime is 266839. The next prime is 266863. The reversal of 266858 is 858662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441 + ... + 2547.

It is an arithmetic number, because the mean of its divisors is an integer number (26730).

2²⁶⁶⁸⁵⁸ is an apocalyptic number.

266858 is a deficient number, since it is larger than the sum of its proper divisors (160822).

266858 is a wasteful number, since it uses less digits than its factorization.

266858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181.

The product of its digits is 23040, while the sum is 35.

The square root of 266858 is about 516.5830039790. The cubic root of 266858 is about 64.3813494853.

The spelling of 266858 in words is "two hundred sixty-six thousand, eight hundred fifty-eight".