2000666069 has 2 divisors, whose sum is σ = 2000666070. Its totient is φ = 2000666068.

The previous prime is 2000665969. The next prime is 2000666071. The reversal of 2000666069 is 9606660002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1943663569 + 57002500 = 44087^2 + 7550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000666069 - 2¹⁶ = 2000600533 is a prime.

It is a super-2 number, since 2×2000666069² = 8005329439295825522, which contains 22 as substring.

Together with 2000666071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000666099) 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, 1000333034 + 1000333035.

It is an arithmetic number, because the mean of its divisors is an integer number (1000333035).

Almost surely, 2^2000666069 is an apocalyptic number.

It is an amenable number.

2000666069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000666069 is an equidigital number, since it uses as much as digits as its factorization.

2000666069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 2000666069 is about 44728.8058078907. The cubic root of 2000666069 is about 1260.0609000967.

The spelling of 2000666069 in words is "two billion, six hundred sixty-six thousand, sixty-nine".