# What is 67 factorial ?

Steps to calculate factorial of 67

## How to calculate the factorial of 67

To find 67 factorial, or 67!, simply use the formula that multiplies the number 67 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of Sixty-seven :

67! is exactly : 36471110918188685288249859096605464427167635314049524593701628500267962436943872000000000000000

Factorial of 67 can be calculated as:
67! = 67 x 66 x 65 x 64 x ... x 3 x 2 x 1

The number of trailing zeros in 67! is 16

The number of digits in 67 factorial is 95.

## What Is Factorial?

A factorial is symbolized by an integer and an exclamation mark. In arithmetic, factorial is a multiplication process of natural numbers .

It multiplies the number by every noreal number that is less than it .

Symbolically, it is symbolized as "!".

The function is used, among other things, to find the "n" way items can be positioned .

## Factorial Formula

To find the factorial of any given number, change the exact value for n in the given way :

n! = n × (n-1) × (n-2) × (n-3) × ….× 3 × 2 × 1

The expansion of the formula provides the numbers to be multiplied at the same time to get the factorial of the number.

We can also calculate a factorial from the previous one. The factorial of any number is that number times the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :
67! Factorial = 67 x 66 x 65 x 64 x ... x 3 x 2 x 1 = 67 × 66! = 36471110918188685288249859096605464427167635314049524593701628500267962436943872000000000000000

## What are Factorials Used For?

The best use of factorial is in Combinations and Permutations.

Example : Determine how to arrange letters without repeating?

There one way for 1 letter "a":
2 ways for two letters "ab": ab, ba.
There are 6 ways for 3 letters "abc": abc acb cab bac bca.
There are 24 ways for 1234 of the letters "abcd"

## Frequently Asked Questions on Factorial

### Can we have factorials for negative numbers ?

Negative number factorials are undefined

### What Is 0!

Zero factorial or Factorial of 0 is simple, and its value is equal to 1. So, 0! = 1.