66542024543 has 2 divisors, whose sum is σ = 66542024544. Its totient is φ = 66542024542.

The previous prime is 66542024531. The next prime is 66542024573. The reversal of 66542024543 is 34542024566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66542024543 - 2⁸ = 66542024287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66542024543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66542024503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33271012271 + 33271012272.

It is an arithmetic number, because the mean of its divisors is an integer number (33271012272).

Almost surely, 2^66542024543 is an apocalyptic number.

66542024543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66542024543 is an equidigital number, since it uses as much as digits as its factorization.

66542024543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 66542024543 in words is "sixty-six billion, five hundred forty-two million, twenty-four thousand, five hundred forty-three".