66105103423 has 2 divisors, whose sum is σ = 66105103424. Its totient is φ = 66105103422.

The previous prime is 66105103417. The next prime is 66105103433. The reversal of 66105103423 is 32430150166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66105103423 - 2²⁹ = 65568232511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105103403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052551711 + 33052551712.

It is an arithmetic number, because the mean of its divisors is an integer number (33052551712).

Almost surely, 2^66105103423 is an apocalyptic number.

66105103423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105103423 is an equidigital number, since it uses as much as digits as its factorization.

66105103423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 66105103423 its reverse (32430150166), we get a palindrome (98535253589).

The spelling of 66105103423 in words is "sixty-six billion, one hundred five million, one hundred three thousand, four hundred twenty-three".