9966190609 has 2 divisors, whose sum is σ = 9966190610. Its totient is φ = 9966190608.

The previous prime is 9966190573. The next prime is 9966190613. The reversal of 9966190609 is 9060916699.

9966190609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7232992209 + 2733198400 = 85047^2 + 52280^2 .

It is a cyclic number.

It is not a de Polignac number, because 9966190609 - 2³³ = 1376256017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9966190609.

It is not a weakly prime, because it can be changed into another prime (9966190639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983095304 + 4983095305.

It is an arithmetic number, because the mean of its divisors is an integer number (4983095305).

Almost surely, 2^9966190609 is an apocalyptic number.

It is an amenable number.

9966190609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966190609 is an equidigital number, since it uses as much as digits as its factorization.

9966190609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The square root of 9966190609 is about 99830.8099185817. The cubic root of 9966190609 is about 2152.0039444086.

The spelling of 9966190609 in words is "nine billion, nine hundred sixty-six million, one hundred ninety thousand, six hundred nine".