666338 has 8 divisors (see below), whose sum is σ = 1004880. Its totient is φ = 331380.

The previous prime is 666329. The next prime is 666353. The reversal of 666338 is 833666.

It is a happy number.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666338.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (125610).

2⁶⁶⁶³³⁸ is an apocalyptic number.

666338 is a deficient number, since it is larger than the sum of its proper divisors (338542).

666338 is a wasteful number, since it uses less digits than its factorization.

666338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792.

The product of its digits is 15552, while the sum is 32.

The square root of 666338 is about 816.2952897083. The cubic root of 666338 is about 87.3436882749.

The spelling of 666338 in words is "six hundred sixty-six thousand, three hundred thirty-eight".