66105630621071 has 2 divisors, whose sum is σ = 66105630621072. Its totient is φ = 66105630621070.

The previous prime is 66105630621013. The next prime is 66105630621077. The reversal of 66105630621071 is 17012603650166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66105630621071 - 2⁶ = 66105630621007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66105630621077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33052815310535 + 33052815310536.

It is an arithmetic number, because the mean of its divisors is an integer number (33052815310536).

Almost surely, 2^{66105630621071} is an apocalyptic number.

66105630621071 is a deficient number, since it is larger than the sum of its proper divisors (1).

66105630621071 is an equidigital number, since it uses as much as digits as its factorization.

66105630621071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 66105630621071 in words is "sixty-six trillion, one hundred five billion, six hundred thirty million, six hundred twenty-one thousand, seventy-one".