5661661551067 has 2 divisors, whose sum is σ = 5661661551068. Its totient is φ = 5661661551066.

The previous prime is 5661661551001. The next prime is 5661661551109. The reversal of 5661661551067 is 7601551661665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661661551067 - 2⁷ = 5661661550939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5661661550999 and 5661661551017.

It is not a weakly prime, because it can be changed into another prime (5661661551467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830830775533 + 2830830775534.

It is an arithmetic number, because the mean of its divisors is an integer number (2830830775534).

Almost surely, 2^{5661661551067} is an apocalyptic number.

5661661551067 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661661551067 is an equidigital number, since it uses as much as digits as its factorization.

5661661551067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 5661661551067 in words is "five trillion, six hundred sixty-one billion, six hundred sixty-one million, five hundred fifty-one thousand, sixty-seven".