Q: What is the negative version of the number 666,521,213?
A: -666,521,213
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:
| 666,521,211 | 666,521,212 | 666,521,214 | 666,521,215 |
| -666,521,211 | -666,521,212 | -666,521,214 | -666,521,215 |