10666805 has 4 divisors (see below), whose sum is σ = 12800172. Its totient is φ = 8533440.

The previous prime is 10666801. The next prime is 10666807. The reversal of 10666805 is 50866601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3818116 + 6848689 = 1954^2 + 2617^2 .

It is not a de Polignac number, because 10666805 - 2² = 10666801 is a prime.

It is a super-2 number, since 2×10666805² = 227561457816050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666801) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1066676 + ... + 1066685.

It is an arithmetic number, because the mean of its divisors is an integer number (3200043).

Almost surely, 2^10666805 is an apocalyptic number.

It is an amenable number.

10666805 is a deficient number, since it is larger than the sum of its proper divisors (2133367).

10666805 is an equidigital number, since it uses as much as digits as its factorization.

10666805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133366.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 10666805 is about 3266.0075015223. The cubic root of 10666805 is about 220.1294348526.

The spelling of 10666805 in words is "ten million, six hundred sixty-six thousand, eight hundred five".