9966745671 has 8 divisors (see below), whose sum is σ = 13326641520. Its totient is φ = 6625673472.

The previous prime is 9966745667. The next prime is 9966745777. The reversal of 9966745671 is 1765476699.

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

It is not a de Polignac number, because 9966745671 - 2² = 9966745667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966745171) 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, 4704676 + ... + 4706793.

It is an arithmetic number, because the mean of its divisors is an integer number (1665830190).

Almost surely, 2^9966745671 is an apocalyptic number.

9966745671 is a deficient number, since it is larger than the sum of its proper divisors (3359895849).

9966745671 is a wasteful number, since it uses less digits than its factorization.

9966745671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9411825.

The product of its digits is 17146080, while the sum is 60.

The square root of 9966745671 is about 99833.5898933821. The cubic root of 9966745671 is about 2152.0438952613.

The spelling of 9966745671 in words is "nine billion, nine hundred sixty-six million, seven hundred forty-five thousand, six hundred seventy-one".