Small disnub snub prismatosnub pentishexacosipentishecatonicosachoron

The small disnub snub prismatosnub pentishexacosipentishecatonicosachoron, or sidsospas pixphi, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 600 great dodecahedra, 4800 cuboctahedra (in pairs in the same hyperplane, forming 2400 compounds of 2), 600 rhombidodecadodecahedra, 600 small ditrigonal dodecicosidodecahedra and 600 small icosicosidodecahedra (one of each in the same hyperplane, forming 600 compounds), 3600 pentagrammic prisms, and 3000 truncated tetrahedra (600 of which form 120 truncated chiricosahedra).

One great icosahedron, one great dodecahedron, eight cuboctahedra, five rhombidodecadodecahedra, five small ditrigonal dodecicosidodecahedra, five small icosicosidodecahedra, five pentagrammic prisms, and five truncated tetrahedra (one compound and four single) join at each vertex.

It can be obtained as the blend of 5 siddip xappady and 5 sidphixdahix.

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