805566085 has 48 divisors (see below), whose sum is σ = 1064581056. Its totient is φ = 584672256.

The previous prime is 805566059. The next prime is 805566103. The reversal of 805566085 is 580665508.

It is not a de Polignac number, because 805566085 - 2¹⁵ = 805533317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7528602 + ... + 7528708.

It is an arithmetic number, because the mean of its divisors is an integer number (22178772).

Almost surely, 2^805566085 is an apocalyptic number.

It is an amenable number.

805566085 is a deficient number, since it is larger than the sum of its proper divisors (259014971).

805566085 is a wasteful number, since it uses less digits than its factorization.

805566085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The square root of 805566085 is about 28382.4961023515. The cubic root of 805566085 is about 930.4657492910.

The spelling of 805566085 in words is "eight hundred five million, five hundred sixty-six thousand, eighty-five".