Yes, but only if you already own a valid license for Office 2016. You cannot mix architectures. If you have 32-bit Office installed, you must uninstall it completely before installing the 64-bit version.
Go to the official Microsoft Office setup page (setup.office.com) or sign into your Microsoft Account associated with the product key. Microsoft Office 2016 Free Download 64 Bit
If you type that keyword into Google, you will see millions of results. Most come from torrent sites, "crack" forums, or file-sharing networks like Mediafire or Mega. Do not use these. Yes, but only if you already own a