687366 has 20 divisors (see below), whose sum is σ = 1540572. Its totient is φ = 229068.

The previous prime is 687359. The next prime is 687383. The reversal of 687366 is 663786.

It is a happy number.

687366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 687366.

It is a congruent number.

It is an unprimeable number.

687366 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 9 ways as a sum of consecutive naturals, for example, 1960 + ... + 2283.

2⁶⁸⁷³⁶⁶ is an apocalyptic number.

687366 is an abundant number, since it is smaller than the sum of its proper divisors (853206).

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

687366 is a wasteful number, since it uses less digits than its factorization.

687366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4257 (or 4248 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 687366 is about 829.0753886107. The cubic root of 687366 is about 88.2529738690.

The spelling of 687366 in words is "six hundred eighty-seven thousand, three hundred sixty-six".