66468818775 has 12 divisors (see below), whose sum is σ = 109895113832. Its totient is φ = 35450036640.

The previous prime is 66468818747. The next prime is 66468818813. The reversal of 66468818775 is 57781886466.

It is a happy number.

It is not a de Polignac number, because 66468818775 - 2¹⁸ = 66468556631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443125384 + ... + 443125533.

Almost surely, 2^66468818775 is an apocalyptic number.

66468818775 is a deficient number, since it is larger than the sum of its proper divisors (43426295057).

66468818775 is a wasteful number, since it uses less digits than its factorization.

66468818775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886250930 (or 886250925 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 66.

The spelling of 66468818775 in words is "sixty-six billion, four hundred sixty-eight million, eight hundred eighteen thousand, seven hundred seventy-five".