666683333 has 2 divisors, whose sum is σ = 666683334. Its totient is φ = 666683332.

The previous prime is 666683317. The next prime is 666683341. The reversal of 666683333 is 333386666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464531809 + 202151524 = 21553^2 + 14218^2 .

It is a cyclic number.

It is not a de Polignac number, because 666683333 - 2⁴ = 666683317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666683363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333341666 + 333341667.

It is an arithmetic number, because the mean of its divisors is an integer number (333341667).

Almost surely, 2^666683333 is an apocalyptic number.

It is an amenable number.

666683333 is a deficient number, since it is larger than the sum of its proper divisors (1).

666683333 is an equidigital number, since it uses as much as digits as its factorization.

666683333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 44.

The square root of 666683333 is about 25820.2117148563. The cubic root of 666683333 is about 873.5877443672.

The spelling of 666683333 in words is "six hundred sixty-six million, six hundred eighty-three thousand, three hundred thirty-three".