Q: What is the negative version of the number 21,615,661?
A: -21,615,661
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:
| 21,615,659 | 21,615,660 | 21,615,662 | 21,615,663 |
| -21,615,659 | -21,615,660 | -21,615,662 | -21,615,663 |