9666805 has 8 divisors (see below), whose sum is σ = 11913912. Its totient is φ = 7524288.

The previous prime is 9666799. The next prime is 9666817. The reversal of 9666805 is 5086669.

9666805 = 2198² + 2199².

It can be written as a sum of positive squares in 4 ways, for example, as 1865956 + 7800849 = 1366^2 + 2793^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 9666805 - 2¹¹ = 9664757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25942 + ... + 26311.

It is an arithmetic number, because the mean of its divisors is an integer number (1489239).

Almost surely, 2^9666805 is an apocalyptic number.

9666805 is the 2199-th centered square number.

It is an amenable number.

9666805 is a deficient number, since it is larger than the sum of its proper divisors (2247107).

9666805 is a wasteful number, since it uses less digits than its factorization.

9666805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52295.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 9666805 is about 3109.1485972851. The cubic root of 9666805 is about 213.0235670838.

The spelling of 9666805 in words is "nine million, six hundred sixty-six thousand, eight hundred five".