9666216 has 80 divisors (see below), whose sum is σ = 30956640. Its totient is φ = 2760480.

The previous prime is 9666197. The next prime is 9666227. The reversal of 9666216 is 6126669.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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 19 ways as a sum of consecutive naturals, for example, 3471 + ... + 5601.

It is an arithmetic number, because the mean of its divisors is an integer number (386958).

Almost surely, 2^9666216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9666216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15478320).

9666216 is an abundant number, since it is smaller than the sum of its proper divisors (21290424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9666216 is a wasteful number, since it uses less digits than its factorization.

9666216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156 (or 2143 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 9666216 is about 3109.0538753775. The cubic root of 9666216 is about 213.0192404758.

The spelling of 9666216 in words is "nine million, six hundred sixty-six thousand, two hundred sixteen".