Q: What is the negative version of the number 666,506,221?
A: -666,506,221
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:
| 666,506,219 | 666,506,220 | 666,506,222 | 666,506,223 |
| -666,506,219 | -666,506,220 | -666,506,222 | -666,506,223 |