66243056143 has 16 divisors (see below), whose sum is σ = 73027977120. Its totient is φ = 59586048000.

The previous prime is 66243056123. The next prime is 66243056189. The reversal of 66243056143 is 34165034266.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66243056143 - 2²⁵ = 66209501711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66243056096 and 66243056105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243056123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1769071 + ... + 1806127.

It is an arithmetic number, because the mean of its divisors is an integer number (4564248570).

Almost surely, 2^66243056143 is an apocalyptic number.

66243056143 is a deficient number, since it is larger than the sum of its proper divisors (6784920977).

66243056143 is a wasteful number, since it uses less digits than its factorization.

66243056143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38778.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 66243056143 in words is "sixty-six billion, two hundred forty-three million, fifty-six thousand, one hundred forty-three".