9666220 has 24 divisors (see below), whose sum is σ = 20361600. Its totient is φ = 3854592.

The previous prime is 9666197. The next prime is 9666227. The reversal of 9666220 is 226669.

It is an Ulam number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9666227) 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, 9076 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (848400).

Almost surely, 2^9666220 is an apocalyptic number.

It is an amenable number.

9666220 is an abundant number, since it is smaller than the sum of its proper divisors (10695380).

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

9666220 is a wasteful number, since it uses less digits than its factorization.

9666220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1495 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 9666220 is about 3109.0545186600. The cubic root of 9666220 is about 213.0192698591.

The spelling of 9666220 in words is "nine million, six hundred sixty-six thousand, two hundred twenty".