9666221158 has 16 divisors (see below), whose sum is σ = 16649951040. Its totient is φ = 4162487400.

The previous prime is 9666221141. The next prime is 9666221179. The reversal of 9666221158 is 8511226669.

It is a super-3 number, since 3×9666221158³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11562048 + ... + 11562883.

It is an arithmetic number, because the mean of its divisors is an integer number (1040621940).

Almost surely, 2^9666221158 is an apocalyptic number.

9666221158 is a deficient number, since it is larger than the sum of its proper divisors (6983729882).

9666221158 is a wasteful number, since it uses less digits than its factorization.

9666221158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23124963.

The product of its digits is 311040, while the sum is 46.

The square root of 9666221158 is about 98316.9423751573. The cubic root of 9666221158 is about 2130.1927836559.

The spelling of 9666221158 in words is "nine billion, six hundred sixty-six million, two hundred twenty-one thousand, one hundred fifty-eight".