659946 has 32 divisors (see below), whose sum is σ = 1589760. Its totient is φ = 178416.

The previous prime is 659941. The next prime is 659947. The reversal of 659946 is 649956.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (659941) by changing a digit.

659946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (49680).

2⁶⁵⁹⁹⁴⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794880).

659946 is an abundant number, since it is smaller than the sum of its proper divisors (929814).

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

659946 is a wasteful number, since it uses less digits than its factorization.

659946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its digits is 58320, while the sum is 39.

The square root of 659946 is about 812.3706050812. The cubic root of 659946 is about 87.0635023231.

It can be divided in two parts, 65 and 9946, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 659946 in words is "six hundred fifty-nine thousand, nine hundred forty-six".