667384 has 8 divisors (see below), whose sum is σ = 1251360. Its totient is φ = 333688.

The previous prime is 667379. The next prime is 667417. The reversal of 667384 is 483766.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

667384 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41704 + ... + 41719.

It is an arithmetic number, because the mean of its divisors is an integer number (156420).

2⁶⁶⁷³⁸⁴ is an apocalyptic number.

It is an amenable number.

667384 is a deficient number, since it is larger than the sum of its proper divisors (583976).

667384 is a wasteful number, since it uses less digits than its factorization.

667384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83429 (or 83425 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 667384 is about 816.9357379868. The cubic root of 667384 is about 87.3893676618.

The spelling of 667384 in words is "six hundred sixty-seven thousand, three hundred eighty-four".