66666683 has 2 divisors, whose sum is σ = 66666684. Its totient is φ = 66666682.

The previous prime is 66666667. The next prime is 66666713. The reversal of 66666683 is 38666666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66666683 - 2⁴ = 66666667 is a prime.

It is not a weakly prime, because it can be changed into another prime (66666643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333341 + 33333342.

It is an arithmetic number, because the mean of its divisors is an integer number (33333342).

Almost surely, 2^66666683 is an apocalyptic number.

66666683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66666683 is an equidigital number, since it uses as much as digits as its factorization.

66666683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 47.

The square root of 66666683 is about 8164.9668094855. The cubic root of 66666683 is about 405.4801661524.

The spelling of 66666683 in words is "sixty-six million, six hundred sixty-six thousand, six hundred eighty-three".