66000505547 has 2 divisors, whose sum is σ = 66000505548. Its totient is φ = 66000505546.

The previous prime is 66000505517. The next prime is 66000505573. The reversal of 66000505547 is 74550500066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66000505547 - 2²⁴ = 65983728331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66000505547.

It is not a weakly prime, because it can be changed into another prime (66000505517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000252773 + 33000252774.

It is an arithmetic number, because the mean of its divisors is an integer number (33000252774).

Almost surely, 2^66000505547 is an apocalyptic number.

66000505547 is a deficient number, since it is larger than the sum of its proper divisors (1).

66000505547 is an equidigital number, since it uses as much as digits as its factorization.

66000505547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 38.

The spelling of 66000505547 in words is "sixty-six billion, five hundred five thousand, five hundred forty-seven".