258090665 has 8 divisors (see below), whose sum is σ = 353952960. Its totient is φ = 176976432.

The previous prime is 258090647. The next prime is 258090671. The reversal of 258090665 is 566090852.

258090665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 258090665 - 2¹⁶ = 258025129 is a prime.

It is a super-2 number, since 2×258090665² = 133221582720284450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3686975 + ... + 3687044.

It is an arithmetic number, because the mean of its divisors is an integer number (44244120).

Almost surely, 2^258090665 is an apocalyptic number.

It is an amenable number.

258090665 is a deficient number, since it is larger than the sum of its proper divisors (95862295).

258090665 is an equidigital number, since it uses as much as digits as its factorization.

258090665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374031.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 258090665 is about 16065.2004344795. The cubic root of 258090665 is about 636.6842386471.

The spelling of 258090665 in words is "two hundred fifty-eight million, ninety thousand, six hundred sixty-five".