Yes
No it doesn't require to be hyphenated.
Yes it should be hyphenated.
It Is A Special Hyphen
Non-breaking hyphen
Nonbreaking Hyphen
You should use a hyphen to represent years with more than two digits that end in a number other than zero, such as twenty-seven and one hundred and thirty-three. The hyphen is only used between the last two digits.
No, a hyphen is not needed.
Tumblr URLs can't start or end with a hyphen.
without a hyphen idiot
No. Fully, when used as an adverb, is not followed by a hyphen. :)
No.