55666523629 has 2 divisors, whose sum is σ = 55666523630. Its totient is φ = 55666523628.

The previous prime is 55666523623. The next prime is 55666523669. The reversal of 55666523629 is 92632566655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55588907529 + 77616100 = 235773^2 + 8810^2 .

It is a cyclic number.

It is not a de Polignac number, because 55666523629 - 2⁷ = 55666523501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55666523629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666523623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833261814 + 27833261815.

It is an arithmetic number, because the mean of its divisors is an integer number (27833261815).

Almost surely, 2^55666523629 is an apocalyptic number.

It is an amenable number.

55666523629 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666523629 is an equidigital number, since it uses as much as digits as its factorization.

55666523629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496000, while the sum is 55.

The spelling of 55666523629 in words is "fifty-five billion, six hundred sixty-six million, five hundred twenty-three thousand, six hundred twenty-nine".