806755561 has 8 divisors (see below), whose sum is σ = 863139200. Its totient is φ = 751764240.

The previous prime is 806755507. The next prime is 806755591. The reversal of 806755561 is 165557608.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-806755561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806755591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 346881 + ... + 349198.

It is an arithmetic number, because the mean of its divisors is an integer number (107892400).

Almost surely, 2^806755561 is an apocalyptic number.

It is an amenable number.

806755561 is a deficient number, since it is larger than the sum of its proper divisors (56383639).

806755561 is a wasteful number, since it uses less digits than its factorization.

806755561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696159.

The product of its (nonzero) digits is 252000, while the sum is 43.

The square root of 806755561 is about 28403.4427666788. The cubic root of 806755561 is about 930.9234905012.

The spelling of 806755561 in words is "eight hundred six million, seven hundred fifty-five thousand, five hundred sixty-one".