"sesenta y seis" meaning in Spanish

{
  "hyphenation": [
    "se‧sen‧ta"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "num",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "name": "Spanish cardinal numbers",
          "parents": [
            "Cardinal numbers",
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "sixty-six"
      ],
      "id": "en-sesenta_y_seis-es-num-9j2~Hv1s",
      "links": [
        [
          "sixty-six",
          "sixty-six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/seˌsenta i ˈseis/"
    },
    {
      "ipa": "[seˌsẽn̪.t̪a i ˈsei̯s]"
    }
  ],
  "word": "sesenta y seis"
}

{
  "hyphenation": [
    "se‧sen‧ta"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "num",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Spanish cardinal numbers",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish links with redundant alt parameters",
        "Spanish multiword terms",
        "Spanish numerals",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "sixty-six"
      ],
      "links": [
        [
          "sixty-six",
          "sixty-six"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/seˌsenta i ˈseis/"
    },
    {
      "ipa": "[seˌsẽn̪.t̪a i ˈsei̯s]"
    }
  ],
  "word": "sesenta y seis"
}