55666257321061 has 2 divisors, whose sum is σ = 55666257321062. Its totient is φ = 55666257321060.

The previous prime is 55666257321041. The next prime is 55666257321149. The reversal of 55666257321061 is 16012375266655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53794816905025 + 1871440416036 = 7334495^2 + 1368006^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666257321061 - 2⁵ = 55666257321029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55666257320993 and 55666257321011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666257321041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833128660530 + 27833128660531.

It is an arithmetic number, because the mean of its divisors is an integer number (27833128660531).

Almost surely, 2^{55666257321061} is an apocalyptic number.

It is an amenable number.

55666257321061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666257321061 is an equidigital number, since it uses as much as digits as its factorization.

55666257321061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608000, while the sum is 55.

The spelling of 55666257321061 in words is "fifty-five trillion, six hundred sixty-six billion, two hundred fifty-seven million, three hundred twenty-one thousand, sixty-one".