If you have verified the file is safe and want to access its contents, you will need an extraction tool such as: (Free and Open Source) WinRAR (The original creator of the .rar format)
: Did you download this from a reputable forum (like XDA or MyDigitalLife) or a random pop-up? If you didn't specifically go looking for a "tiny" x64 utility, delete it . Aapx64tiny.rar