9966671 has 8 divisors (see below), whose sum is σ = 11709264. Its totient is φ = 8363520.

The previous prime is 9966667. The next prime is 9966689. The reversal of 9966671 is 1766699.

It is a happy number.

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

It is not a de Polignac number, because 9966671 - 2² = 9966667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34706 + ... + 34991.

It is an arithmetic number, because the mean of its divisors is an integer number (1463658).

Almost surely, 2^9966671 is an apocalyptic number.

9966671 is a deficient number, since it is larger than the sum of its proper divisors (1742593).

9966671 is a wasteful number, since it uses less digits than its factorization.

9966671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69721.

The product of its digits is 122472, while the sum is 44.

The square root of 9966671 is about 3157.0034843186. The cubic root of 9966671 is about 215.2038520867.

It can be divided in two parts, 996 and 6671, that added together give a palindrome (7667).

The spelling of 9966671 in words is "nine million, nine hundred sixty-six thousand, six hundred seventy-one".