636066223818 has 16 divisors (see below), whose sum is σ = 1296134947296. Its totient is φ = 208021658000.

The previous prime is 636066223811. The next prime is 636066223831. The reversal of 636066223818 is 818322660636.

It is not an unprimeable number, because it can be changed into a prime (636066223811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000103808 + ... + 1000104443.

It is an arithmetic number, because the mean of its divisors is an integer number (81008434206).

Almost surely, 2^636066223818 is an apocalyptic number.

636066223818 is an abundant number, since it is smaller than the sum of its proper divisors (660068723478).

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

636066223818 is a wasteful number, since it uses less digits than its factorization.

636066223818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000208309.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 636066223818 in words is "six hundred thirty-six billion, sixty-six million, two hundred twenty-three thousand, eight hundred eighteen".