259664 has 10 divisors (see below), whose sum is σ = 503130. Its totient is φ = 129824.

The previous prime is 259657. The next prime is 259667. The reversal of 259664 is 466952.

It can be written as a sum of positive squares in only one way, i.e., 258064 + 1600 = 508^2 + 40^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 259664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8099 + ... + 8130.

It is an arithmetic number, because the mean of its divisors is an integer number (50313).

2²⁵⁹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

259664 is a deficient number, since it is larger than the sum of its proper divisors (243466).

259664 is a wasteful number, since it uses less digits than its factorization.

259664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16237 (or 16231 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 259664 is about 509.5723697376. The cubic root of 259664 is about 63.7975372719.

The spelling of 259664 in words is "two hundred fifty-nine thousand, six hundred sixty-four".