66468818774 has 16 divisors (see below), whose sum is σ = 101564791296. Its totient is φ = 32617549800.

The previous prime is 66468818747. The next prime is 66468818813. The reversal of 66468818774 is 47781886466.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66468818774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 878882 + ... + 951509.

It is an arithmetic number, because the mean of its divisors is an integer number (6347799456).

Almost surely, 2^66468818774 is an apocalyptic number.

66468818774 is a deficient number, since it is larger than the sum of its proper divisors (35095972522).

66468818774 is a wasteful number, since it uses less digits than its factorization.

66468818774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830731.

The product of its digits is 86704128, while the sum is 65.

The spelling of 66468818774 in words is "sixty-six billion, four hundred sixty-eight million, eight hundred eighteen thousand, seven hundred seventy-four".