7757

This number is a prime.

A prime of the form sod(1879^496+1955^496) + sod(1879^28+1955^28) - sod(1879^6+1955^6). Note that all the sums of digits (sods) in parenthesis are also primes (7457, 401, 101) and 6, 28, 496 are the first three perfect numbers. Einstein (1879-1955). [Sariyar]

The largest prime-digit prime to appear in the first 1000 digits of e, starting at the digit 37. [Gupta]