696

696 = 2 x 2 x 2 x 3 x 29.

696 is a palindrome n so that n(n + 8) is also palindromic (489984).

696 has the representation 3⁶ - 33.

970,225 is the fourth square number that is the sum of the square of two consecutive numbers (696 and 697): 970,225 = 985² = 696² + 697². In other words, (696, 697, 985) is the fourth Pythagorean triple where two sides are consecutive integers.

696 is 3120 in base 6 and 2013 in base 7. It is 853 in base 9 and 583 in base 11.

696 is the sum of eight consecutive primes: 696 = 71 + 73 + 79 + 83 + 89 + 97 + 101 + 103.

Source: What's Special About This Number?