5566641021157 has 2 divisors, whose sum is σ = 5566641021158. Its totient is φ = 5566641021156.

The previous prime is 5566641021083. The next prime is 5566641021199. The reversal of 5566641021157 is 7511201466655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4802404890721 + 764236130436 = 2191439^2 + 874206^2 .

It is a cyclic number.

It is not a de Polignac number, because 5566641021157 - 2¹¹ = 5566641019109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5566641021157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5566641022157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783320510578 + 2783320510579.

It is an arithmetic number, because the mean of its divisors is an integer number (2783320510579).

Almost surely, 2^{5566641021157} is an apocalyptic number.

It is an amenable number.

5566641021157 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566641021157 is an equidigital number, since it uses as much as digits as its factorization.

5566641021157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 5566641021157 in words is "five trillion, five hundred sixty-six billion, six hundred forty-one million, twenty-one thousand, one hundred fifty-seven".