55666729423 has 2 divisors, whose sum is σ = 55666729424. Its totient is φ = 55666729422.

The previous prime is 55666729411. The next prime is 55666729463. The reversal of 55666729423 is 32492766655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55666729423 - 2⁹ = 55666728911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55666729463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833364711 + 27833364712.

It is an arithmetic number, because the mean of its divisors is an integer number (27833364712).

Almost surely, 2^55666729423 is an apocalyptic number.

55666729423 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666729423 is an equidigital number, since it uses as much as digits as its factorization.

55666729423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 55.

The spelling of 55666729423 in words is "fifty-five billion, six hundred sixty-six million, seven hundred twenty-nine thousand, four hundred twenty-three".