1668518516682 has 48 divisors (see below), whose sum is σ = 3778010316288. Its totient is φ = 531186495840.

The previous prime is 1668518516677. The next prime is 1668518516683. The reversal of 1668518516682 is 2866158158661.

1668518516682 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 51 + 8 + 516 + 68 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1668518516683) 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, 2774938 + ... + 3322245.

It is an arithmetic number, because the mean of its divisors is an integer number (78708548256).

Almost surely, 2^{1668518516682} is an apocalyptic number.

1668518516682 is an abundant number, since it is smaller than the sum of its proper divisors (2109491799606).

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

1668518516682 is a wasteful number, since it uses less digits than its factorization.

1668518516682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097875 (or 6097872 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The spelling of 1668518516682 in words is "one trillion, six hundred sixty-eight billion, five hundred eighteen million, five hundred sixteen thousand, six hundred eighty-two".