258866 has 8 divisors (see below), whose sum is σ = 393984. Its totient is φ = 127540.

The previous prime is 258847. The next prime is 258871. The reversal of 258866 is 668852.

258866 is nontrivially palindromic in base 14.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

258866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2²⁵⁸⁸⁶⁶ is an apocalyptic number.

258866 is a deficient number, since it is larger than the sum of its proper divisors (135118).

258866 is a wasteful number, since it uses less digits than its factorization.

258866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

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

The square root of 258866 is about 508.7887577374. The cubic root of 258866 is about 63.7321159625.

The spelling of 258866 in words is "two hundred fifty-eight thousand, eight hundred sixty-six".