66044610520423 has 2 divisors, whose sum is σ = 66044610520424. Its totient is φ = 66044610520422.

The previous prime is 66044610520409. The next prime is 66044610520519. The reversal of 66044610520423 is 32402501644066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66044610520423 - 2⁵ = 66044610520391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66044610520423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66044610520523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33022305260211 + 33022305260212.

It is an arithmetic number, because the mean of its divisors is an integer number (33022305260212).

Almost surely, 2^{66044610520423} is an apocalyptic number.

66044610520423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66044610520423 is an equidigital number, since it uses as much as digits as its factorization.

66044610520423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 66044610520423 in words is "sixty-six trillion, forty-four billion, six hundred ten million, five hundred twenty thousand, four hundred twenty-three".