9666220133 has 2 divisors, whose sum is σ = 9666220134. Its totient is φ = 9666220132.

The previous prime is 9666220073. The next prime is 9666220159. The reversal of 9666220133 is 3310226669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9112229764 + 553990369 = 95458^2 + 23537^2 .

It is a cyclic number.

It is not a de Polignac number, because 9666220133 - 2⁸ = 9666219877 is a prime.

It is a super-2 number, since 2×9666220133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9666220183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833110066 + 4833110067.

It is an arithmetic number, because the mean of its divisors is an integer number (4833110067).

Almost surely, 2^9666220133 is an apocalyptic number.

It is an amenable number.

9666220133 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666220133 is an equidigital number, since it uses as much as digits as its factorization.

9666220133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 9666220133 is about 98316.9371624239. The cubic root of 9666220133 is about 2130.1927083611.

The spelling of 9666220133 in words is "nine billion, six hundred sixty-six million, two hundred twenty thousand, one hundred thirty-three".