Q: What is the negative version of the number 664,231,409?
A: -664,231,409
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:
| 664,231,407 | 664,231,408 | 664,231,410 | 664,231,411 |
| -664,231,407 | -664,231,408 | -664,231,410 | -664,231,411 |