667386 has 32 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 209088.

The previous prime is 667379. The next prime is 667417. The reversal of 667386 is 683766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 667386.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555 + ... + 1281.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2⁶⁶⁷³⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786240).

667386 is an abundant number, since it is smaller than the sum of its proper divisors (905094).

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

667386 is a wasteful number, since it uses less digits than its factorization.

667386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 749 counting only the distinct ones).

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

The square root of 667386 is about 816.9369620723. The cubic root of 667386 is about 87.3894549571.

The spelling of 667386 in words is "six hundred sixty-seven thousand, three hundred eighty-six".