258166163 has 4 divisors (see below), whose sum is σ = 258212760. Its totient is φ = 258119568.

The previous prime is 258166121. The next prime is 258166177. The reversal of 258166163 is 361661852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258166163 - 2¹⁰ = 258165139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258126163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13658 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (64553190).

Almost surely, 2^258166163 is an apocalyptic number.

258166163 is a deficient number, since it is larger than the sum of its proper divisors (46597).

258166163 is an equidigital number, since it uses as much as digits as its factorization.

258166163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46596.

The product of its digits is 51840, while the sum is 38.

The square root of 258166163 is about 16067.5499999222. The cubic root of 258166163 is about 636.7463146367.

The spelling of 258166163 in words is "two hundred fifty-eight million, one hundred sixty-six thousand, one hundred sixty-three".