3.13.0-66.108) is not available, but a newer one is (3.13.0-166.216). We redirected you there.
/usr/lib/linux-tools/4.13.0-37-lowlatency/turbostat is in linux-tools-4.13.0-37-lowlatency 4.13.0-37.42~16.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/4.13.0-37-lowlatency/../../linux-hwe-tools-4.13.0-37/turbostat