165610 has 8 divisors (see below), whose sum is σ = 298116. Its totient is φ = 66240.

The previous prime is 165601. The next prime is 165611. The reversal of 165610 is 16561.

165610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 20449 = 381^2 + 143^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (165611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8271 + ... + 8290.

2¹⁶⁵⁶¹⁰ is an apocalyptic number.

165610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165610 is a deficient number, since it is larger than the sum of its proper divisors (132506).

165610 is a wasteful number, since it uses less digits than its factorization.

165610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16568.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 165610 is about 406.9520856317. The cubic root of 165610 is about 54.9155729470.

The spelling of 165610 in words is "one hundred sixty-five thousand, six hundred ten".