55666347361 has 2 divisors, whose sum is σ = 55666347362. Its totient is φ = 55666347360.

The previous prime is 55666347329. The next prime is 55666347377. The reversal of 55666347361 is 16374366655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46378206736 + 9288140625 = 215356^2 + 96375^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666347361 - 2⁵ = 55666347329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55666347299 and 55666347308.

It is not a weakly prime, because it can be changed into another prime (55666347661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833173680 + 27833173681.

It is an arithmetic number, because the mean of its divisors is an integer number (27833173681).

Almost surely, 2^55666347361 is an apocalyptic number.

It is an amenable number.

55666347361 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666347361 is an equidigital number, since it uses as much as digits as its factorization.

55666347361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 52.

The spelling of 55666347361 in words is "fifty-five billion, six hundred sixty-six million, three hundred forty-seven thousand, three hundred sixty-one".