666346 has 8 divisors (see below), whose sum is σ = 1016640. Its totient is φ = 327468.

The previous prime is 666329. The next prime is 666353. The reversal of 666346 is 643666.

666346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 2706 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (127080).

2⁶⁶⁶³⁴⁶ is an apocalyptic number.

666346 is a deficient number, since it is larger than the sum of its proper divisors (350294).

666346 is a wasteful number, since it uses less digits than its factorization.

666346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708.

The product of its digits is 15552, while the sum is 31.

The square root of 666346 is about 816.3001898811. The cubic root of 666346 is about 87.3440378206.

The spelling of 666346 in words is "six hundred sixty-six thousand, three hundred forty-six".