/usr/lib/x86_64-linux-gnu/libsundials_nvecopenmp.so.2 is in libsundials-nvecparallel-openmp2 2.7.0+dfsg-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsundials_nvecopenmp.so.2.7.0