65736816 has 20 divisors (see below), whose sum is σ = 169820232. Its totient is φ = 21912256.

The previous prime is 65736791. The next prime is 65736877. The reversal of 65736816 is 61863756.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684711 + ... + 684806.

Almost surely, 2^65736816 is an apocalyptic number.

It is an amenable number.

65736816 is an abundant number, since it is smaller than the sum of its proper divisors (104083416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65736816 is a wasteful number, since it uses less digits than its factorization.

65736816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369528 (or 1369522 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 65736816 is about 8107.8243690894. The cubic root of 65736816 is about 403.5861199460.

It can be divided in two parts, 657 and 36816, that added together give a palindrome (37473).

The spelling of 65736816 in words is "sixty-five million, seven hundred thirty-six thousand, eight hundred sixteen".