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77 is a natural number that comes after 76 and before 78. It is a palindromic number.

ScienceEdit

In science, 77 is:

ReferencesEdit

  1. "It's Elemental - The Element Iridium". education.jlab.org. 2015. Retrieved 24 August 2015.
  2. "It's Elemental - The Element Nitrogen". education.jlab.org. 2015. Retrieved 24 August 2015.