/usr/lib/x86_64-linux-gnu/libGLEW.so is in libglew-dev 1.13.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libGLEW.so.1.13.0
/usr/lib/x86_64-linux-gnu/libGLEW.so.1.13.0