/usr/lib/x86_64-linux-gnu/libliggghts.so is in libliggghts-dev 3.5.0+repack1-10.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libliggghts.so.3
/usr/lib/x86_64-linux-gnu/libliggghts.so.3