5660621102581 has 2 divisors, whose sum is σ = 5660621102582. Its totient is φ = 5660621102580.

The previous prime is 5660621102497. The next prime is 5660621102639. The reversal of 5660621102581 is 1852011260665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5614217480356 + 46403622225 = 2369434^2 + 215415^2 .

It is a cyclic number.

It is not a de Polignac number, because 5660621102581 - 2⁹ = 5660621102069 is a prime.

It is a super-2 number, since 2×5660621102581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5660621102681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830310551290 + 2830310551291.

It is an arithmetic number, because the mean of its divisors is an integer number (2830310551291).

Almost surely, 2^{5660621102581} is an apocalyptic number.

It is an amenable number.

5660621102581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5660621102581 is an equidigital number, since it uses as much as digits as its factorization.

5660621102581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 5660621102581 in words is "five trillion, six hundred sixty billion, six hundred twenty-one million, one hundred two thousand, five hundred eighty-one".