9666945 has 20 divisors (see below), whose sum is σ = 17329620. Its totient is φ = 5155488.

The previous prime is 9666941. The next prime is 9666989. The reversal of 9666945 is 5496669.

It can be written as a sum of positive squares in 2 ways, for example, as 5602689 + 4064256 = 2367^2 + 2016^2 .

It is not a de Polignac number, because 9666945 - 2² = 9666941 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9666945.

It is not an unprimeable number, because it can be changed into a prime (9666941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11530 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (866481).

Almost surely, 2^9666945 is an apocalyptic number.

It is an amenable number.

9666945 is a deficient number, since it is larger than the sum of its proper divisors (7662675).

9666945 is a wasteful number, since it uses less digits than its factorization.

9666945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23886 (or 23877 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 9666945 is about 3109.1711114057. The cubic root of 9666945 is about 213.0245954538.

The spelling of 9666945 in words is "nine million, six hundred sixty-six thousand, nine hundred forty-five".