According to a BMI calculator, your BMI is 18.6, which is within the healthy weight range (BTW, the healthy range is 18.5-24.9). Just keep in mind, that is the low end of healthy. But that is just one way to calculate whether a weight is healthy and not necessarily the most accurate.
Two things concern me. One: why you would wait until after you hit your goal weight to ask if it's healthy. Two: if you reached that goal weight in a healthy manner.
In the end, the number on the scale is just a number. If you're eating right, exercising, and feeling good about yourself then you're doing fine.
OP, great job and congrats! Sorry, I can't really give a good answer to your question as I am right now recovering too. Congrats still :]
Sophie, I reccomend seeking advice from medical professional. You frequently post on the forums and this really shouldn't be your primary source of advice and guidance on this subject matter.
If you are recovering from an eating disorder, and asking "is X weight okay?," then you're not recovered. You'll be recovered once you stop caring about a number on the scale and start trusting your body, not people on the internet.