66956885147 has 2 divisors, whose sum is σ = 66956885148. Its totient is φ = 66956885146.

The previous prime is 66956885141. The next prime is 66956885179. The reversal of 66956885147 is 74158865966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66956885147 - 2¹⁰ = 66956884123 is a prime.

It is not a weakly prime, because it can be changed into another prime (66956885141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33478442573 + 33478442574.

It is an arithmetic number, because the mean of its divisors is an integer number (33478442574).

Almost surely, 2^66956885147 is an apocalyptic number.

66956885147 is a deficient number, since it is larger than the sum of its proper divisors (1).

66956885147 is an equidigital number, since it uses as much as digits as its factorization.

66956885147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 65.

The spelling of 66956885147 in words is "sixty-six billion, nine hundred fifty-six million, eight hundred eighty-five thousand, one hundred forty-seven".