6551560655501 has 2 divisors, whose sum is σ = 6551560655502. Its totient is φ = 6551560655500.

The previous prime is 6551560655491. The next prime is 6551560655513. The reversal of 6551560655501 is 1055560651556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5949081977476 + 602478678025 = 2439074^2 + 776195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6551560655501 is a prime.

It is a super-2 number, since 2×6551560655501² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6551560655501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6551560655201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275780327750 + 3275780327751.

It is an arithmetic number, because the mean of its divisors is an integer number (3275780327751).

Almost surely, 2^{6551560655501} is an apocalyptic number.

It is an amenable number.

6551560655501 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551560655501 is an equidigital number, since it uses as much as digits as its factorization.

6551560655501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375000, while the sum is 50.

The spelling of 6551560655501 in words is "six trillion, five hundred fifty-one billion, five hundred sixty million, six hundred fifty-five thousand, five hundred one".