666830 has 8 divisors (see below), whose sum is σ = 1200312. Its totient is φ = 266728.

The previous prime is 666829. The next prime is 666857. The reversal of 666830 is 38666.

666830 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 a junction number, because it is equal to n+sod(n) for n = 666793 and 666802.

It is a congruent number.

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, 33332 + ... + 33351.

It is an arithmetic number, because the mean of its divisors is an integer number (150039).

2⁶⁶⁶⁸³⁰ is an apocalyptic number.

666830 is a deficient number, since it is larger than the sum of its proper divisors (533482).

666830 is a wasteful number, since it uses less digits than its factorization.

666830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66690.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 666830 is about 816.5965956334. The cubic root of 666830 is about 87.3651801315.

The spelling of 666830 in words is "six hundred sixty-six thousand, eight hundred thirty".