Calculate the number 7787

An elderly priest was speaking to a younger priest. "You had a good idea to replace the first four pews with plush bucket theatre seats. It worked like a charm! The front of the church always fills first now."As the young priest nodded, the old priest continued, “You also told me to assign a little more beat to the music because it would bring young people back to church. So, I supported you when you bought in that rock ‘n’ roll Gospel choir. Now, our services are consistently packed.“"Thank you, Father," answered the young priest. "I am pleased that you are open to the new ideas of youth.""All of these ideas have been well and good," said the elderly priest. "But, I'm afraid you've gone too far with the drive-thru confessional." "But Father," protested the young priest. "My confessions and donations have nearly doubled since I began that!""Yes," replied, the elderly priest. "I appreciate that, but the flashing neon sign, ‘Toot 'n’ Tell or Go to Hell’ cannot stay on the church roof!"-