Small disnub snub heptishexacosipentishecatonicosachoron

The small disnub snub heptishexacosipentishecatonicosachoron, or sidsoshexphi, is a nonconvex uniform polychoron that consists of 600 great icosahedra and 600 small stellated dodecahedra (some of which lie in the same hyperplanes, forming 600 compounds of one of each of them), 600 icosahedra, 4800 cuboctahedra (forming 2400 compounds of two of them), 600 small rhombidodecahedra, 600 rhombidodecadodecahedra, 600 truncated icosahedra, and 3000 truncated tetrahedra (600 of which form 120 truncated chiricosahedra).

One great icosahedron and one small stellated dodecahedron (one compound), one icosahedron, eight cuboctahedra (eight compounds), five small rhombidodecahedra, five rhombidodecadodecahedra, five truncated icosahedra, and five truncated tetrahedra (one compound and four single) join at each vertex.

It can be obtained as the blend of 5 small dipentary hecatonicosihexacosidishecatonicosachora and 5 small dipentary hexacosihecatonicosihexacositrishecatonicosachora.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small diretrosnub disnub decahecatonicosadishexacosichoron.