102066665689 has 2 divisors, whose sum is σ = 102066665690. Its totient is φ = 102066665688.

The previous prime is 102066665651. The next prime is 102066665693. The reversal of 102066665689 is 986566660201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101819704464 + 246961225 = 319092^2 + 15715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102066665689 is a prime.

It is a super-3 number, since 3×102066665689³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (102066663689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51033332844 + 51033332845.

It is an arithmetic number, because the mean of its divisors is an integer number (51033332845).

Almost surely, 2^102066665689 is an apocalyptic number.

It is an amenable number.

102066665689 is a deficient number, since it is larger than the sum of its proper divisors (1).

102066665689 is an equidigital number, since it uses as much as digits as its factorization.

102066665689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 102066665689 in words is "one hundred two billion, sixty-six million, six hundred sixty-five thousand, six hundred eighty-nine".