66500940347 has 2 divisors, whose sum is σ = 66500940348. Its totient is φ = 66500940346.

The previous prime is 66500940301. The next prime is 66500940421. The reversal of 66500940347 is 74304900566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66500940347 - 2¹⁸ = 66500678203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66500940298 and 66500940307.

It is not a weakly prime, because it can be changed into another prime (66500940047) 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, 33250470173 + 33250470174.

It is an arithmetic number, because the mean of its divisors is an integer number (33250470174).

Almost surely, 2^66500940347 is an apocalyptic number.

66500940347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66500940347 is an equidigital number, since it uses as much as digits as its factorization.

66500940347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 66500940347 in words is "sixty-six billion, five hundred million, nine hundred forty thousand, three hundred forty-seven".