800882321665 has 4 divisors (see below), whose sum is σ = 961058786004. Its totient is φ = 640705857328.

The previous prime is 800882321647. The next prime is 800882321669. The reversal of 800882321665 is 566123288008.

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 95302481521 + 705579840144 = 308711^2 + 839988^2 .

It is a cyclic number.

It is not a de Polignac number, because 800882321665 - 2⁹ = 800882321153 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (800882321669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80088232162 + ... + 80088232171.

It is an arithmetic number, because the mean of its divisors is an integer number (240264696501).

Almost surely, 2^800882321665 is an apocalyptic number.

It is an amenable number.

800882321665 is a deficient number, since it is larger than the sum of its proper divisors (160176464339).

800882321665 is a wasteful number, since it uses less digits than its factorization.

800882321665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160176464338.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 800882321665 in words is "eight hundred billion, eight hundred eighty-two million, three hundred twenty-one thousand, six hundred sixty-five".