666683 has 2 divisors, whose sum is σ = 666684. Its totient is φ = 666682.

The previous prime is 666671. The next prime is 666697. The reversal of 666683 is 386666.

666683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666683 - 2⁴ = 666667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (666643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333341 + 333342.

It is an arithmetic number, because the mean of its divisors is an integer number (333342).

2⁶⁶⁶⁶⁸³ is an apocalyptic number.

666683 is a deficient number, since it is larger than the sum of its proper divisors (1).

666683 is an equidigital number, since it uses as much as digits as its factorization.

666683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 666683 is about 816.5065829496. The cubic root of 666683 is about 87.3587598918.

The spelling of 666683 in words is "six hundred sixty-six thousand, six hundred eighty-three".