FT 6639 TRUST AGREEMENT Dated: April 25, 2017Trust Agreement • April 25th, 2017 • Ft 6639
Contract Type FiledApril 25th, 2017 CompanyThe Trust Agreement among First Trust Portfolios L.P., as Depositor, The Bank of New York Mellon, as Trustee, First Trust Advisors L.P., as Evaluator and Portfolio Supervisor, sets forth certain provisions in full and incorporates other provisions by reference to the document entitled "Standard Terms and Conditions of Trust for FT 4484 and certain subsequent Series, Effective: November 6, 2013" (herein called the "Standard Terms and Conditions of Trust"), and such provisions as are incorporated by reference constitute a single instrument. All references herein to Articles and Sections are to Articles and Sections of the Standard Terms and Conditions of Trust.