Is Numbers 64-bit when it is run on my Macbook Pro with Mavericks?

I suppose I should brake this question out into three parts. Is there a 64-bit version of Numbers that I can load onto my MacBook Pro, will the iCloud beta version operate a 64-bit version of Numbers, and is the iOS version of Numbers 64-bit??? My real interest is in the first and second questions. Microsoft offers a 64-bit version of Excel for Windows but on their website recommends most users run the 32-bit version because of incompatibilities with 3rd party add-ins.