Q: What is the negative version of the number 644,665,321?
A: -644,665,321
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:
| 644,665,319 | 644,665,320 | 644,665,322 | 644,665,323 |
| -644,665,319 | -644,665,320 | -644,665,322 | -644,665,323 |