65689 has 8 divisors (see below), whose sum is σ = 73472. Its totient is φ = 58320.

The previous prime is 65687. The next prime is 65699. The reversal of 65689 is 98656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65689 - 2¹ = 65687 is a prime.

It is a super-3 number, since 3×65689³ = 850352918033307, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322 + ... + 484.

It is an arithmetic number, because the mean of its divisors is an integer number (9184).

2⁶⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

65689 is a deficient number, since it is larger than the sum of its proper divisors (7783).

65689 is a wasteful number, since it uses less digits than its factorization.

65689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its digits is 12960, while the sum is 34.

The square root of 65689 is about 256.2986539177. The cubic root of 65689 is about 40.3488241994.

The spelling of 65689 in words is "sixty-five thousand, six hundred eighty-nine".