5661656041 has 2 divisors, whose sum is σ = 5661656042. Its totient is φ = 5661656040.

The previous prime is 5661656027. The next prime is 5661656053. The reversal of 5661656041 is 1406561665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5630251225 + 31404816 = 75035^2 + 5604^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661656041 - 2¹¹ = 5661653993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5661655985 and 5661656003.

It is not a weakly prime, because it can be changed into another prime (5661656141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830828020 + 2830828021.

It is an arithmetic number, because the mean of its divisors is an integer number (2830828021).

Almost surely, 2^5661656041 is an apocalyptic number.

It is an amenable number.

5661656041 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661656041 is an equidigital number, since it uses as much as digits as its factorization.

5661656041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 5661656041 is about 75243.9767755533. The cubic root of 5661656041 is about 1782.3014502142.

The spelling of 5661656041 in words is "five billion, six hundred sixty-one million, six hundred fifty-six thousand, forty-one".