10002066661 has 2 divisors, whose sum is σ = 10002066662. Its totient is φ = 10002066660.

The previous prime is 10002066653. The next prime is 10002066673. The reversal of 10002066661 is 16666020001.

10002066661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8137122436 + 1864944225 = 90206^2 + 43185^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002066661 - 2³ = 10002066653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002066601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001033330 + 5001033331.

It is an arithmetic number, because the mean of its divisors is an integer number (5001033331).

Almost surely, 2^10002066661 is an apocalyptic number.

It is an amenable number.

10002066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002066661 is an equidigital number, since it uses as much as digits as its factorization.

10002066661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 10002066661 its reverse (16666020001), we get a palindrome (26668086662).

The spelling of 10002066661 in words is "ten billion, two million, sixty-six thousand, six hundred sixty-one".