659646 has 24 divisors (see below), whose sum is σ = 1539720. Its totient is φ = 202896.

The previous prime is 659639. The next prime is 659653. The reversal of 659646 is 646956.

It is a happy number.

659646 is a `hidden beast` number, since 6 + 5 + 9 + 646 = 666.

It is an interprime number because it is at equal distance from previous prime (659639) and next prime (659653).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 659646.

It is a congruent number.

It is an unprimeable number.

659646 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 11 ways as a sum of consecutive naturals, for example, 1176 + ... + 1643.

It is an arithmetic number, because the mean of its divisors is an integer number (64155).

2⁶⁵⁹⁶⁴⁶ is an apocalyptic number.

659646 is an abundant number, since it is smaller than the sum of its proper divisors (880074).

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

659646 is a wasteful number, since it uses less digits than its factorization.

659646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840 (or 2837 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 659646 is about 812.1859393021. The cubic root of 659646 is about 87.0503078044.

The spelling of 659646 in words is "six hundred fifty-nine thousand, six hundred forty-six".