667385 has 8 divisors (see below), whose sum is σ = 807936. Its totient is φ = 529200.

The previous prime is 667379. The next prime is 667417. The reversal of 667385 is 583766.

It is a happy number.

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

It is not a de Polignac number, because 667385 - 2⁶ = 667321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (100992).

2⁶⁶⁷³⁸⁵ is an apocalyptic number.

It is an amenable number.

667385 is a deficient number, since it is larger than the sum of its proper divisors (140551).

667385 is a wasteful number, since it uses less digits than its factorization.

667385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183.

The product of its digits is 30240, while the sum is 35.

The square root of 667385 is about 816.9363500298. The cubic root of 667385 is about 87.3894113095.

The spelling of 667385 in words is "six hundred sixty-seven thousand, three hundred eighty-five".