5668651561 has 2 divisors, whose sum is σ = 5668651562. Its totient is φ = 5668651560.

The previous prime is 5668651531. The next prime is 5668651609. The reversal of 5668651561 is 1651568665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5588459536 + 80192025 = 74756^2 + 8955^2 .

It is a cyclic number.

It is not a de Polignac number, because 5668651561 - 2⁹ = 5668651049 is a prime.

It is a super-2 number, since 2×5668651561² = 64267221040055473442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5668651531) 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, 2834325780 + 2834325781.

It is an arithmetic number, because the mean of its divisors is an integer number (2834325781).

Almost surely, 2^5668651561 is an apocalyptic number.

It is an amenable number.

5668651561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5668651561 is an equidigital number, since it uses as much as digits as its factorization.

5668651561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 49.

The square root of 5668651561 is about 75290.4480063706. The cubic root of 5668651561 is about 1783.0352163116.

The spelling of 5668651561 in words is "five billion, six hundred sixty-eight million, six hundred fifty-one thousand, five hundred sixty-one".