258666056187 has 64 divisors (see below), whose sum is σ = 449106149376. Its totient is φ = 128409240960.

The previous prime is 258666056101. The next prime is 258666056267. The reversal of 258666056187 is 781650666852.

It is a happy number.

It is not a de Polignac number, because 258666056187 - 2²⁶ = 258598947323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 258666056187.

It is not an unprimeable number, because it can be changed into a prime (258666058187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5784838 + ... + 5829380.

It is an arithmetic number, because the mean of its divisors is an integer number (7017283584).

Almost surely, 2^258666056187 is an apocalyptic number.

258666056187 is a deficient number, since it is larger than the sum of its proper divisors (190440093189).

258666056187 is a wasteful number, since it uses less digits than its factorization.

258666056187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45680.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 258666056187 in words is "two hundred fifty-eight billion, six hundred sixty-six million, fifty-six thousand, one hundred eighty-seven".