662081685818 has 16 divisors (see below), whose sum is σ = 1135122820800. Its totient is φ = 283717882656.

The previous prime is 662081685817. The next prime is 662081685821. The reversal of 662081685818 is 818586180266.

It is not an unprimeable number, because it can be changed into a prime (662081685817) 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, 2486396 + ... + 2739767.

It is an arithmetic number, because the mean of its divisors is an integer number (70945176300).

Almost surely, 2^662081685818 is an apocalyptic number.

662081685818 is a deficient number, since it is larger than the sum of its proper divisors (473041134982).

662081685818 is a wasteful number, since it uses less digits than its factorization.

662081685818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235221.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 662081685818 in words is "six hundred sixty-two billion, eighty-one million, six hundred eighty-five thousand, eight hundred eighteen".