679668 has 48 divisors (see below), whose sum is σ = 1827840. Its totient is φ = 194400.

The previous prime is 679639. The next prime is 679669. The reversal of 679668 is 866976.

It is a happy number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2373 + ... + 2643.

It is an arithmetic number, because the mean of its divisors is an integer number (38080).

2⁶⁷⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913920).

679668 is an abundant number, since it is smaller than the sum of its proper divisors (1148172).

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

679668 is a wasteful number, since it uses less digits than its factorization.

679668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 679668 is about 824.4197959778. The cubic root of 679668 is about 87.9222798639.

The spelling of 679668 in words is "six hundred seventy-nine thousand, six hundred sixty-eight".