66834843866 has 8 divisors (see below), whose sum is σ = 114574018080. Its totient is φ = 28643504508.

The previous prime is 66834843853. The next prime is 66834843869.

It is a happy number.

66834843866 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66834843799 and 66834843808.

It is not an unprimeable number, because it can be changed into a prime (66834843869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386958696 + ... + 2386958723.

It is an arithmetic number, because the mean of its divisors is an integer number (14321752260).

Almost surely, 2^66834843866 is an apocalyptic number.

66834843866 is a deficient number, since it is larger than the sum of its proper divisors (47739174214).

66834843866 is a wasteful number, since it uses less digits than its factorization.

66834843866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773917428.

The product of its digits is 95551488, while the sum is 62.

The spelling of 66834843866 in words is "sixty-six billion, eight hundred thirty-four million, eight hundred forty-three thousand, eight hundred sixty-six".