The number of permutations of 6 numbers is calculated using the factorial notation, denoted as 6!. The factorial of a number n (n!) is the product of all positive integers up to n.
For 6, it is:
6! = 6 × 5 × 4 × 3 × 2 × 1 = 720
Thus, there are 720 possible permutations of 6 numbers. This means if you have a set of 6 distinct numbers, you can arrange them in 720 different ways.