659644 has 6 divisors (see below), whose sum is σ = 1154384. Its totient is φ = 329820.

The previous prime is 659639. The next prime is 659653. The reversal of 659644 is 446956.

It is a congruent number.

It is an unprimeable number.

659644 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 as a sum of consecutive naturals, namely, 82452 + ... + 82459.

2⁶⁵⁹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

659644 is a deficient number, since it is larger than the sum of its proper divisors (494740).

659644 is a wasteful number, since it uses less digits than its factorization.

659644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164915 (or 164913 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 659644 is about 812.1847080560. The cubic root of 659644 is about 87.0502198275.

The spelling of 659644 in words is "six hundred fifty-nine thousand, six hundred forty-four".