50665 has 4 divisors (see below), whose sum is σ = 60804. Its totient is φ = 40528.

The previous prime is 50651. The next prime is 50671. The reversal of 50665 is 56605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56605 = 5 ⋅11321.

It can be written as a sum of positive squares in 2 ways, for example, as 29929 + 20736 = 173^2 + 144^2 .

It is a cyclic number.

It is not a de Polignac number, because 50665 - 2⁹ = 50153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5062 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (15201).

2⁵⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

50665 is a deficient number, since it is larger than the sum of its proper divisors (10139).

50665 is a wasteful number, since it uses less digits than its factorization.

50665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10138.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 50665 is about 225.0888713375. The cubic root of 50665 is about 37.0029216101.

The spelling of 50665 in words is "fifty thousand, six hundred sixty-five".