9666444869 has 8 divisors (see below), whose sum is σ = 9850179072. Its totient is φ = 9484097760.

The previous prime is 9666444863. The next prime is 9666444871. The reversal of 9666444869 is 9684446669.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9666444869 is a prime.

It is a super-2 number, since 2×9666444869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666444863) by changing a digit.

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, 332699 + ... + 360584.

It is an arithmetic number, because the mean of its divisors is an integer number (1231272384).

Almost surely, 2^9666444869 is an apocalyptic number.

It is an amenable number.

9666444869 is a deficient number, since it is larger than the sum of its proper divisors (183734203).

9666444869 is a wasteful number, since it uses less digits than its factorization.

9666444869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693547.

The product of its digits is 53747712, while the sum is 62.

The square root of 9666444869 is about 98318.0800717752. The cubic root of 9666444869 is about 2130.2092169609.

The spelling of 9666444869 in words is "nine billion, six hundred sixty-six million, four hundred forty-four thousand, eight hundred sixty-nine".