808561066 has 8 divisors (see below), whose sum is σ = 1213033284. Its totient is φ = 404216640.

The previous prime is 808561051. The next prime is 808561133. The reversal of 808561066 is 660165808.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 660233025 + 148328041 = 25695^2 + 12179^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 14145 + ... + 42628.

Almost surely, 2^808561066 is an apocalyptic number.

808561066 is a deficient number, since it is larger than the sum of its proper divisors (404472218).

808561066 is a wasteful number, since it uses less digits than its factorization.

808561066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63896.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 808561066 is about 28435.2082109486. The cubic root of 808561066 is about 931.6174366386.

The spelling of 808561066 in words is "eight hundred eight million, five hundred sixty-one thousand, sixty-six".