Q: What is the negative version of the number 663,426,221?
A: -663,426,221
Negative numbers are usually written with - in front of them. They represent a number that is less than zero.
Here are more examples of negative numbers in sequence:
| 663,426,219 | 663,426,220 | 663,426,222 | 663,426,223 |
| -663,426,219 | -663,426,220 | -663,426,222 | -663,426,223 |