805397590566 has 12 divisors (see below), whose sum is σ = 1745028112932. Its totient is φ = 268465863516.

The previous prime is 805397590559. The next prime is 805397590579. The reversal of 805397590566 is 665095793508.

805397590566 is a `hidden beast` number, since 8 + 0 + 5 + 39 + 7 + 590 + 5 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22372155276 + ... + 22372155311.

It is an arithmetic number, because the mean of its divisors is an integer number (145419009411).

Almost surely, 2^805397590566 is an apocalyptic number.

805397590566 is an abundant number, since it is smaller than the sum of its proper divisors (939630522366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

805397590566 is a wasteful number, since it uses less digits than its factorization.

805397590566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44744310595 (or 44744310592 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 805397590566 in words is "eight hundred five billion, three hundred ninety-seven million, five hundred ninety thousand, five hundred sixty-six".