65166 has 8 divisors (see below), whose sum is σ = 130344. Its totient is φ = 21720.

The previous prime is 65147. The next prime is 65167. The reversal of 65166 is 66156.

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

65166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5425 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (16293).

2⁶⁵¹⁶⁶ is an apocalyptic number.

65166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65172).

65166 is a wasteful number, since it uses less digits than its factorization.

65166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10866.

The product of its digits is 1080, while the sum is 24.

The square root of 65166 is about 255.2763208760. The cubic root of 65166 is about 40.2414562064.

Subtracting 65166 from its reverse (66156), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 651 and 66, that added together give a palindrome (717).

The spelling of 65166 in words is "sixty-five thousand, one hundred sixty-six".