Q: What is the negative version of the number 665,643,661?
A: -665,643,661
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:
| 665,643,659 | 665,643,660 | 665,643,662 | 665,643,663 |
| -665,643,659 | -665,643,660 | -665,643,662 | -665,643,663 |