55666501504973 has 2 divisors, whose sum is σ = 55666501504974. Its totient is φ = 55666501504972.

The previous prime is 55666501504969. The next prime is 55666501504997. The reversal of 55666501504973 is 37940510566655.

55666501504973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55644170088004 + 22331416969 = 7459502^2 + 149437^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666501504973 - 2² = 55666501504969 is a prime.

It is a super-2 number, since 2×55666501504973² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666501504073) 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, 27833250752486 + 27833250752487.

It is an arithmetic number, because the mean of its divisors is an integer number (27833250752487).

Almost surely, 2^{55666501504973} is an apocalyptic number.

It is an amenable number.

55666501504973 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666501504973 is an equidigital number, since it uses as much as digits as its factorization.

55666501504973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060000, while the sum is 62.

The spelling of 55666501504973 in words is "fifty-five trillion, six hundred sixty-six billion, five hundred one million, five hundred four thousand, nine hundred seventy-three".