806808551 has 4 divisors (see below), whose sum is σ = 807066792. Its totient is φ = 806550312.

The previous prime is 806808529. The next prime is 806808557. The reversal of 806808551 is 155808608.

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 806808551 - 2⁶ = 806808487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 806808499 and 806808508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806808557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124376 + ... + 130701.

It is an arithmetic number, because the mean of its divisors is an integer number (201766698).

Almost surely, 2^806808551 is an apocalyptic number.

806808551 is a deficient number, since it is larger than the sum of its proper divisors (258241).

806808551 is a wasteful number, since it uses less digits than its factorization.

806808551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258240.

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 806808551 is about 28404.3755608181. The cubic root of 806808551 is about 930.9438719559.

The spelling of 806808551 in words is "eight hundred six million, eight hundred eight thousand, five hundred fifty-one".