858669966858 has 64 divisors (see below), whose sum is σ = 1944296939520. Its totient is φ = 250422513600.

The previous prime is 858669966857. The next prime is 858669966881.

858669966858 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×858669966858² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (858669966851) 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 31 ways as a sum of consecutive naturals, for example, 126010 + ... + 1316517.

It is an arithmetic number, because the mean of its divisors is an integer number (30379639680).

Almost surely, 2^858669966858 is an apocalyptic number.

858669966858 is an abundant number, since it is smaller than the sum of its proper divisors (1085626972662).

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

858669966858 is a wasteful number, since it uses less digits than its factorization.

858669966858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442883.

The product of its digits is 10749542400, while the sum is 84.

The spelling of 858669966858 in words is "eight hundred fifty-eight billion, six hundred sixty-nine million, nine hundred sixty-six thousand, eight hundred fifty-eight".