/usr/lib/x86_64-linux-gnu/wine/bin/wine64-preloader is in wine64 1.6.2-20.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/wine/bin/wine-preloader
/usr/lib/x86_64-linux-gnu/wine/bin/wine-preloader