659678 has 8 divisors (see below), whose sum is σ = 993000. Its totient is φ = 328680.

The previous prime is 659671. The next prime is 659689. The reversal of 659678 is 876956.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659671) by changing a digit.

659678 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 3 ways as a sum of consecutive naturals, for example, 668 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (124125).

2⁶⁵⁹⁶⁷⁸ is an apocalyptic number.

659678 is a deficient number, since it is larger than the sum of its proper divisors (333322).

659678 is a wasteful number, since it uses less digits than its factorization.

659678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its digits is 90720, while the sum is 41.

The square root of 659678 is about 812.2056389856. The cubic root of 659678 is about 87.0517154103.

The spelling of 659678 in words is "six hundred fifty-nine thousand, six hundred seventy-eight".