This is the complement of the $\mathrm{NU}_6(2)$ graph. This graph is the folded graph of the Meixner 2-cover of the $U_6(2)$ graph and the Meixner 4-cover of the $U_6(2)$ graph.
| Number of vertices: | $672$ |
| Diameter: | $2$ |
| Intersection array: | $\{176,135;1,48\}$ |
| Spectrum: | $176^1 8^{440} (-16)^{231}$ |
| Automorphism group: | $\mathrm{P} \Gamma \mathrm{L}(6,2)\cong \mathrm{U}_6(2):\mathrm{S}_3$ |
| Distance-transitive: | Yes |
| Primitive |