"T 786 - in 'Deewaar', the 786 billa in his coat pocket saved him when he was shot at... when it dropped out in the climax, he was shot and died. In 'Coolie' climax, the 'chaadar' draped over his body though shot at, saved him... many stories that relate to 786," tweeted Big B.
"The Muslim brothers and sisters when they write on paper always write 786 on top as an auspicious beginning. Bismillah ir Rahman nir Rahim... In the Name of Allah the most merciful the most kind... the significance of the number," he added.
The 69-year-old megastar says the number became quite a phenomenon in India after his 1975 film "Deewaar", which gave him title of angry young man.
"After the release of 'Deewaar', number plates of cars and necklaces and pendants bearing 786 number became most prominent," he wrote.
Amitabh gave signed 786 badges from his films "Deewaar" and "Coolie" to composer duo Vishal-Shekhar.
Thanking him for the gesture, Vishal tweeted to him: "@SrBachchan Sir, the signed Deewaar+Coolie 786 badges you gave us, occupy pride of place in the studio. Brought us great luck! Many thanks!"