65987987760547 has 2 divisors, whose sum is σ = 65987987760548. Its totient is φ = 65987987760546.

The previous prime is 65987987760521. The next prime is 65987987760631. The reversal of 65987987760547 is 74506778978956.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65987987760547 is a prime.

It is a super-2 number, since 2×65987987760547² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65987987760517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993993880273 + 32993993880274.

It is an arithmetic number, because the mean of its divisors is an integer number (32993993880274).

Almost surely, 2^{65987987760547} is an apocalyptic number.

65987987760547 is a deficient number, since it is larger than the sum of its proper divisors (1).

65987987760547 is an equidigital number, since it uses as much as digits as its factorization.

65987987760547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44808422400, while the sum is 88.

The spelling of 65987987760547 in words is "sixty-five trillion, nine hundred eighty-seven billion, nine hundred eighty-seven million, seven hundred sixty thousand, five hundred forty-seven".