65816 has 16 divisors (see below), whose sum is σ = 130200. Its totient is φ = 31104.

The previous prime is 65809. The next prime is 65827. The reversal of 65816 is 61856.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

65816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 368.

2⁶⁵⁸¹⁶ is an apocalyptic number.

It is an amenable number.

65816 is a deficient number, since it is larger than the sum of its proper divisors (64384).

65816 is a wasteful number, since it uses less digits than its factorization.

65816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 454 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 65816 is about 256.5462921190. The cubic root of 65816 is about 40.3748102947.

The spelling of 65816 in words is "sixty-five thousand, eight hundred sixteen".