65650 has 24 divisors (see below), whose sum is σ = 132804. Its totient is φ = 24000.

The previous prime is 65647. The next prime is 65651. The reversal of 65650 is 5656.

It can be written as a sum of positive squares in 6 ways, for example, as 29929 + 35721 = 173^2 + 189^2 .

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

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (65651) 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 11 ways as a sum of consecutive naturals, for example, 600 + ... + 700.

2⁶⁵⁶⁵⁰ is an apocalyptic number.

65650 is an abundant number, since it is smaller than the sum of its proper divisors (67154).

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 (66402).

65650 is a wasteful number, since it uses less digits than its factorization.

65650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 121 counting only the distinct ones).

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

The square root of 65650 is about 256.2225595064. Note that the first 3 decimals coincide. The cubic root of 65650 is about 40.3408374960.

The spelling of 65650 in words is "sixty-five thousand, six hundred fifty".