806564651 has 2 divisors, whose sum is σ = 806564652. Its totient is φ = 806564650.

The previous prime is 806564593. The next prime is 806564657. The reversal of 806564651 is 156465608.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 806564651 - 2¹⁰ = 806563627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 806564599 and 806564608.

It is not a weakly prime, because it can be changed into another prime (806564657) 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 as a sum of consecutive naturals, namely, 403282325 + 403282326.

It is an arithmetic number, because the mean of its divisors is an integer number (403282326).

Almost surely, 2^806564651 is an apocalyptic number.

806564651 is a deficient number, since it is larger than the sum of its proper divisors (1).

806564651 is an equidigital number, since it uses as much as digits as its factorization.

806564651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 806564651 is about 28400.0818836848. The cubic root of 806564651 is about 930.8500537079.

The spelling of 806564651 in words is "eight hundred six million, five hundred sixty-four thousand, six hundred fifty-one".