806694606591 has 4 divisors (see below), whose sum is σ = 1075592808792. Its totient is φ = 537796404392.

The previous prime is 806694606547. The next prime is 806694606631. The reversal of 806694606591 is 195606496608.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 806694606591 - 2¹⁰ = 806694605567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806694604591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134449101096 + ... + 134449101101.

It is an arithmetic number, because the mean of its divisors is an integer number (268898202198).

Almost surely, 2^806694606591 is an apocalyptic number.

806694606591 is a deficient number, since it is larger than the sum of its proper divisors (268898202201).

806694606591 is a wasteful number, since it uses less digits than its factorization.

806694606591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268898202200.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 806694606591 in words is "eight hundred six billion, six hundred ninety-four million, six hundred six thousand, five hundred ninety-one".