Duane Roberts -- the billionaire businessman credited with inventing the frozen burrito -- has died ... TMZ has learned.

In a statement, his wife, Kelly J. Roberts says he passed away peacefully in his sleep Saturday night, just days shy of his 89th birthday. He was surrounded by family and their three dogs when he died.

Kelly called her husband "a visionary entrepreneur, devoted husband, and a man whose heart and generosity forever shaped our family and community."

She continued, "I feel so blessed to have shared 35 wonderful years of marriage with Duane. Together, we built a beautiful life working side by side." She shared Duane was an incredible husband and stepfather and a loving grandfather whose wisdom and warmth touched every generation of their family. Getty

Fun fact -- h

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