8122669561 has 2 divisors, whose sum is σ = 8122669562. Its totient is φ = 8122669560.

The previous prime is 8122669559. The next prime is 8122669661. The reversal of 8122669561 is 1659662218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5439947536 + 2682722025 = 73756^2 + 51795^2 .

It is a cyclic number.

It is not a de Polignac number, because 8122669561 - 2¹ = 8122669559 is a prime.

Together with 8122669559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8122669501) 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 as a sum of consecutive naturals, namely, 4061334780 + 4061334781.

It is an arithmetic number, because the mean of its divisors is an integer number (4061334781).

Almost surely, 2^8122669561 is an apocalyptic number.

It is an amenable number.

8122669561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8122669561 is an equidigital number, since it uses as much as digits as its factorization.

8122669561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 8122669561 is about 90125.8540098234. The cubic root of 8122669561 is about 2010.1706546359.

The spelling of 8122669561 in words is "eight billion, one hundred twenty-two million, six hundred sixty-nine thousand, five hundred sixty-one".