5665561650061 has 2 divisors, whose sum is σ = 5665561650062. Its totient is φ = 5665561650060.

The previous prime is 5665561650031. The next prime is 5665561650071. The reversal of 5665561650061 is 1600561655665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5660378514025 + 5183136036 = 2379155^2 + 71994^2 .

It is a cyclic number.

It is not a de Polignac number, because 5665561650061 - 2¹¹ = 5665561648013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5665561649990 and 5665561650008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5665561650011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832780825030 + 2832780825031.

It is an arithmetic number, because the mean of its divisors is an integer number (2832780825031).

Almost surely, 2^{5665561650061} is an apocalyptic number.

It is an amenable number.

5665561650061 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665561650061 is an equidigital number, since it uses as much as digits as its factorization.

5665561650061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 5665561650061 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-one million, six hundred fifty thousand, sixty-one".