Apart from the twin gematria of Elohim and ha-teva, eighty-six carries no developed symbolism, and its wider modern uses, the slang to eighty-six, meaning to discard or refuse, are unrelated and of uncertain origin. Numerology reduces it to five and reads it through that root. The honest and genuinely interesting core of eighty-six is the equality of God and Nature in Hebrew letter-value, one of the most cited coincidences in gematria.
Where the Chaldean chart and the Balliett-descended chart assign different values to the same letters, a name totalling one figure in one system need not total the same figure in the other, since the two rest on unrelated letter-value tables rather than on a shared inheritance from any single ancient source.
The whole apparatus of digit-reduction numerology is a twentieth-century invention rather than an inheritance from antiquity. Mrs. L. Dow Balliett published the first systematic version, The Philosophy of Numbers, in 1908, fixing the letter-to-number chart still used today and ruling that eleven and twenty-two must stand as master numbers rather than reduce further; her colleague, the physician Julia Seton, is credited with coining the word numerology itself around 1912.