850666803858 has 48 divisors (see below), whose sum is σ = 1851507534240. Its totient is φ = 282264265728.

The previous prime is 850666803851. The next prime is 850666803923. The reversal of 850666803858 is 858308666058.

It is a super-2 number, since 2×850666803858² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 850666803795 and 850666803804.

It is not an unprimeable number, because it can be changed into a prime (850666803851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39782866 + ... + 39804242.

It is an arithmetic number, because the mean of its divisors is an integer number (38573073630).

Almost surely, 2^850666803858 is an apocalyptic number.

850666803858 is an abundant number, since it is smaller than the sum of its proper divisors (1000840730382).

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

850666803858 is a wasteful number, since it uses less digits than its factorization.

850666803858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31351 (or 31348 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 63.

The spelling of 850666803858 in words is "eight hundred fifty billion, six hundred sixty-six million, eight hundred three thousand, eight hundred fifty-eight".