66536 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":39.221621,"wof:name":"66536","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102082663,"localadmin_id":404505573,"postalcode_id":554738205,"region_id":85688555}],"mz:is_deprecated":0,"lbl:latitude":39.225094,"mz:postal_locality_alt":["Saint Marys"],"geom:area":0.016394,"geom:longitude":-96.079273,"wof:id":554738205,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611183104,"wof:belongsto":[102191575,85633793,102082663,404505573,85688555],"wof:concordances":{"gp:id":"12786889"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588445","geom:area_square_m":1.57041578822486E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-96.172332,39.126527,-95.998446,39.299876","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-96.080292,"wof:geomhash":"f2b2080e5f487c44d61ea1998639d668","wof:parent_id":404505573,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"St Marys"}