66962487947 has 2 divisors, whose sum is σ = 66962487948. Its totient is φ = 66962487946.

The previous prime is 66962487847. The next prime is 66962487953. The reversal of 66962487947 is 74978426966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66962487947 - 2¹⁶ = 66962422411 is a prime.

It is not a weakly prime, because it can be changed into another prime (66962487047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33481243973 + 33481243974.

It is an arithmetic number, because the mean of its divisors is an integer number (33481243974).

Almost surely, 2^66962487947 is an apocalyptic number.

66962487947 is a deficient number, since it is larger than the sum of its proper divisors (1).

66962487947 is an equidigital number, since it uses as much as digits as its factorization.

66962487947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 219469824, while the sum is 68.

The spelling of 66962487947 in words is "sixty-six billion, nine hundred sixty-two million, four hundred eighty-seven thousand, nine hundred forty-seven".