9666547847841 has 8 divisors (see below), whose sum is σ = 12990216530944. Its totient is φ = 6393622198320.

The previous prime is 9666547847791. The next prime is 9666547847843. The reversal of 9666547847841 is 1487487456669.

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

It is not a de Polignac number, because 9666547847841 - 2²¹ = 9666545750689 is a prime.

It is a super-2 number, since 2×9666547847841² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9666547847843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12685757950 + ... + 12685758711.

It is an arithmetic number, because the mean of its divisors is an integer number (1623777066368).

Almost surely, 2^{9666547847841} is an apocalyptic number.

It is an amenable number.

9666547847841 is a deficient number, since it is larger than the sum of its proper divisors (3323668683103).

9666547847841 is a wasteful number, since it uses less digits than its factorization.

9666547847841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25371516791.

The product of its digits is 1950842880, while the sum is 75.

The spelling of 9666547847841 in words is "nine trillion, six hundred sixty-six billion, five hundred forty-seven million, eight hundred forty-seven thousand, eight hundred forty-one".