2006666666663 has 2 divisors, whose sum is σ = 2006666666664. Its totient is φ = 2006666666662.

The previous prime is 2006666666647. The next prime is 2006666666687. The reversal of 2006666666663 is 3666666666002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2006666666663 - 2⁴ = 2006666666647 is a prime.

It is a super-2 number, since 2×2006666666663² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006666666063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003333333331 + 1003333333332.

It is an arithmetic number, because the mean of its divisors is an integer number (1003333333332).

Almost surely, 2^{2006666666663} is an apocalyptic number.

2006666666663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006666666663 is an equidigital number, since it uses as much as digits as its factorization.

2006666666663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60466176, while the sum is 59.

The spelling of 2006666666663 in words is "two trillion, six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-three".