If you need to know what "bit" version (bitness) of Microsoft Office you're running, open any Office application (Word, Excel, Access, etc. I'll use Access, of course) and follow these steps:

• Click on File
• Click on Account
• Click on About Access

You'll see a line at the top that says something like this:

Microsoft® Access® for Microsoft 365 MSO (Version 2207 Build 16.0.15427.20182) 64-bit 

That last bit towards the end tells you what "bit" version (bitness) you have. It's either 32-bit or 64-bit. This is important to know because it can effect what you need for some VBA programming. Also, for Access, everyone running your database must have the same bit-version of Office installed if you're using the Runtime edition or making an ACCDE file. You can't mix versions.