660044 has 24 divisors (see below), whose sum is σ = 1440768. Its totient is φ = 257040.

The previous prime is 660029. The next prime is 660047. The reversal of 660044 is 440066.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 659998 and 660025.

It is not an unprimeable number, because it can be changed into a prime (660047) 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 7 ways as a sum of consecutive naturals, for example, 764 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (60032).

2⁶⁶⁰⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

660044 is an abundant number, since it is smaller than the sum of its proper divisors (780724).

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

660044 is a wasteful number, since it uses less digits than its factorization.

660044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2163 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 660044 is about 812.4309201403. The cubic root of 660044 is about 87.0678116660.

The spelling of 660044 in words is "six hundred sixty thousand, forty-four".