659606 has 4 divisors (see below), whose sum is σ = 989412. Its totient is φ = 329802.

The previous prime is 659597. The next prime is 659609. The reversal of 659606 is 606956.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659609) by changing a digit.

659606 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 164900 + ... + 164903.

It is an arithmetic number, because the mean of its divisors is an integer number (247353).

2⁶⁵⁹⁶⁰⁶ is an apocalyptic number.

659606 is a deficient number, since it is larger than the sum of its proper divisors (329806).

659606 is a wasteful number, since it uses less digits than its factorization.

659606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329805.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 659606 is about 812.1613140257. The cubic root of 659606 is about 87.0485482330.

Subtracting from 659606 its reverse (606956), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 659606 in words is "six hundred fifty-nine thousand, six hundred six".