Q: What is the negative version of the number 664,016,721?
A: -664,016,721
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:
| 664,016,719 | 664,016,720 | 664,016,722 | 664,016,723 |
| -664,016,719 | -664,016,720 | -664,016,722 | -664,016,723 |