Q: What is the negative version of the number 664,051,421?
A: -664,051,421
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:
| 664,051,419 | 664,051,420 | 664,051,422 | 664,051,423 |
| -664,051,419 | -664,051,420 | -664,051,422 | -664,051,423 |