8664805 has 4 divisors (see below), whose sum is σ = 10397772. Its totient is φ = 6931840.

The previous prime is 8664791. The next prime is 8664847. The reversal of 8664805 is 5084668.

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 1014049 + 7650756 = 1007^2 + 2766^2 .

It is not a de Polignac number, because 8664805 - 2²¹ = 6567653 is a prime.

It is a Duffinian number.

8664805 is a lucky 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 3 ways as a sum of consecutive naturals, for example, 866476 + ... + 866485.

It is an arithmetic number, because the mean of its divisors is an integer number (2599443).

Almost surely, 2^8664805 is an apocalyptic number.

It is an amenable number.

8664805 is a deficient number, since it is larger than the sum of its proper divisors (1732967).

8664805 is a wasteful number, since it uses less digits than its factorization.

8664805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732966.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 8664805 is about 2943.6040834324. The cubic root of 8664805 is about 205.3932961319.

It can be divided in two parts, 866 and 4805, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 8664805 in words is "eight million, six hundred sixty-four thousand, eight hundred five".