5571660661757 has 2 divisors, whose sum is σ = 5571660661758. Its totient is φ = 5571660661756.

The previous prime is 5571660661751. The next prime is 5571660661837. The reversal of 5571660661757 is 7571660661755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3400431888676 + 2171228773081 = 1844026^2 + 1473509^2 .

It is a cyclic number.

It is not a de Polignac number, because 5571660661757 - 2³² = 5567365694461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5571660661757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5571660661751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2785830330878 + 2785830330879.

It is an arithmetic number, because the mean of its divisors is an integer number (2785830330879).

Almost surely, 2^{5571660661757} is an apocalyptic number.

It is an amenable number.

5571660661757 is a deficient number, since it is larger than the sum of its proper divisors (1).

5571660661757 is an equidigital number, since it uses as much as digits as its factorization.

5571660661757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55566000, while the sum is 62.

The spelling of 5571660661757 in words is "five trillion, five hundred seventy-one billion, six hundred sixty million, six hundred sixty-one thousand, seven hundred fifty-seven".