Q: What is the negative version of the number 665,644,401?
A: -665,644,401
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:
| 665,644,399 | 665,644,400 | 665,644,402 | 665,644,403 |
| -665,644,399 | -665,644,400 | -665,644,402 | -665,644,403 |