20066699 has 2 divisors, whose sum is σ = 20066700. Its totient is φ = 20066698.

The previous prime is 20066689. The next prime is 20066707. The reversal of 20066699 is 99666002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20066699 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20066639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033349 + 10033350.

It is an arithmetic number, because the mean of its divisors is an integer number (10033350).

Almost surely, 2^20066699 is an apocalyptic number.

20066699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066699 is an equidigital number, since it uses as much as digits as its factorization.

20066699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 20066699 is about 4479.5869229205. The cubic root of 20066699 is about 271.7431750755.

The spelling of 20066699 in words is "twenty million, sixty-six thousand, six hundred ninety-nine".