806551761 has 16 divisors (see below), whose sum is σ = 1087636608. Its totient is φ = 531600000.

The previous prime is 806551709. The next prime is 806551763. The reversal of 806551761 is 167155608.

It is not a de Polignac number, because 806551761 - 2⁷ = 806551633 is a prime.

It is a super-2 number, since 2×806551761² = 1301051486344402242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (806551763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267261 + ... + 270261.

It is an arithmetic number, because the mean of its divisors is an integer number (67977288).

Almost surely, 2^806551761 is an apocalyptic number.

It is an amenable number.

806551761 is a deficient number, since it is larger than the sum of its proper divisors (281084847).

806551761 is a wasteful number, since it uses less digits than its factorization.

806551761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 806551761 is about 28399.8549468127. The cubic root of 806551761 is about 930.8450949316.

The spelling of 806551761 in words is "eight hundred six million, five hundred fifty-one thousand, seven hundred sixty-one".