66716000543 has 2 divisors, whose sum is σ = 66716000544. Its totient is φ = 66716000542.

The previous prime is 66716000537. The next prime is 66716000609. The reversal of 66716000543 is 34500061766.

It is a happy number.

66716000543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66716000543 - 2⁸ = 66716000287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66716000497 and 66716000506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66716000243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358000271 + 33358000272.

It is an arithmetic number, because the mean of its divisors is an integer number (33358000272).

Almost surely, 2^66716000543 is an apocalyptic number.

66716000543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66716000543 is an equidigital number, since it uses as much as digits as its factorization.

66716000543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 66716000543 in words is "sixty-six billion, seven hundred sixteen million, five hundred forty-three", and thus it is an aban number.