It depends on your own personal metaboism rate, and the climate where you are inhabiting. Find out the number that does not cause you discomfort physically, and then stick to it.
If you Does not want to gain weight, you should to track the calories you eat daily, especially you are not doing exercise.
About the number of eggs that should eat per day or I think two or three eggs is enough in the day,
and I suggest you to do like me ,one egg in the cup milk and drink it in the morning.