Tirumala, Oct 20 (UNI) The Srivari Navaratri Brahmotsavams concluded successfully at Tirumala with 6.46 lakh devotees having darshan of Lord Venkateswara between October 12 and 19 and hundi offerings amounting to Rs. 25.79 crore, Tirumala Tirupati Devasthanams (TTD) Chairman B.R. Naidu said on Tuesday.