65885 has 4 divisors (see below), whose sum is σ = 79068.
Its totient is φ = 52704.
The previous prime is 65881. The next prime is 65899. The reversal of 65885 is 58856.
65885 = 1812 + 1822.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 33124 + 32761 = 182^2 + 181^2
It is a cyclic number.
It is not a de Polignac number, because 65885 - 22 = 65881 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 11.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65885.
It is not an unprimeable number, because it can be changed into a prime (65881) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6584 + ... + 6593.
It is an arithmetic number, because the mean of its divisors is an integer number (19767).
265885 is an apocalyptic number.
65885 is the 182-nd centered square number.
It is an amenable number.
65885 is a deficient number, since it is larger than the sum of its proper divisors (13183).
65885 is a wasteful number, since it uses less digits than its factorization.
65885 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13182.
The product of its digits is 9600, while the sum is 32.
The square root of 65885 is about 256.6807355452.
The cubic root of 65885 is about 40.3889147118.
The spelling of 65885 in words is "sixty-five thousand, eight hundred eighty-five".