55566110657 has 2 divisors, whose sum is σ = 55566110658. Its totient is φ = 55566110656.

The previous prime is 55566110653. The next prime is 55566110659. The reversal of 55566110657 is 75601166555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54496101136 + 1070009521 = 233444^2 + 32711^2 .

It is a cyclic number.

It is not a de Polignac number, because 55566110657 - 2² = 55566110653 is a prime.

Together with 55566110659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55566110651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27783055328 + 27783055329.

It is an arithmetic number, because the mean of its divisors is an integer number (27783055329).

Almost surely, 2^55566110657 is an apocalyptic number.

It is an amenable number.

55566110657 is a deficient number, since it is larger than the sum of its proper divisors (1).

55566110657 is an equidigital number, since it uses as much as digits as its factorization.

55566110657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 55566110657 in words is "fifty-five billion, five hundred sixty-six million, one hundred ten thousand, six hundred fifty-seven".