Q: What is the negative version of the number 644,665,667?
A: -644,665,667
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:
| 644,665,665 | 644,665,666 | 644,665,668 | 644,665,669 |
| -644,665,665 | -644,665,666 | -644,665,668 | -644,665,669 |