66158547163 has 2 divisors, whose sum is σ = 66158547164. Its totient is φ = 66158547162.

The previous prime is 66158547139. The next prime is 66158547209. The reversal of 66158547163 is 36174585166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66158547163 - 2⁹ = 66158546651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66158547163.

It is not a weakly prime, because it can be changed into another prime (66158947163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33079273581 + 33079273582.

It is an arithmetic number, because the mean of its divisors is an integer number (33079273582).

Almost surely, 2^66158547163 is an apocalyptic number.

66158547163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66158547163 is an equidigital number, since it uses as much as digits as its factorization.

66158547163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 52.

The spelling of 66158547163 in words is "sixty-six billion, one hundred fifty-eight million, five hundred forty-seven thousand, one hundred sixty-three".