Q: What is the negative version of the number 666,721,820?
A: -666,721,820
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:
| 666,721,818 | 666,721,819 | 666,721,821 | 666,721,822 |
| -666,721,818 | -666,721,819 | -666,721,821 | -666,721,822 |