258000660 has 96 divisors (see below), whose sum is σ = 837607680. Its totient is φ = 65805696.

The previous prime is 258000623. The next prime is 258000679. The reversal of 258000660 is 66000852.

258000660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2034 + ... + 22806.

It is an arithmetic number, because the mean of its divisors is an integer number (8725080).

Almost surely, 2^258000660 is an apocalyptic number.

258000660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258000660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418803840).

258000660 is an abundant number, since it is smaller than the sum of its proper divisors (579607020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258000660 is a wasteful number, since it uses less digits than its factorization.

258000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20814 (or 20806 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 258000660 is about 16062.3989490985. The cubic root of 258000660 is about 636.6102188867.

The spelling of 258000660 in words is "two hundred fifty-eight million, six hundred sixty", and thus it is an aban number.