Q: What is the negative version of the number 644,661,064?
A: -644,661,064
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:
| 644,661,062 | 644,661,063 | 644,661,065 | 644,661,066 |
| -644,661,062 | -644,661,063 | -644,661,065 | -644,661,066 |