258664065 has 16 divisors (see below), whose sum is σ = 451486656. Its totient is φ = 125412800.

The previous prime is 258664033. The next prime is 258664067. The reversal of 258664065 is 560466852.

It is not a de Polignac number, because 258664065 - 2⁵ = 258664033 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (258664067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783666 + ... + 783995.

It is an arithmetic number, because the mean of its divisors is an integer number (28217916).

Almost surely, 2^258664065 is an apocalyptic number.

It is an amenable number.

258664065 is a deficient number, since it is larger than the sum of its proper divisors (192822591).

258664065 is a wasteful number, since it uses less digits than its factorization.

258664065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567680.

The product of its (nonzero) digits is 345600, while the sum is 42.

The square root of 258664065 is about 16083.0365603017. The cubic root of 258664065 is about 637.1553969943.

The spelling of 258664065 in words is "two hundred fifty-eight million, six hundred sixty-four thousand, sixty-five".