66468019776 has 28 divisors (see below), whose sum is σ = 175863302832. Its totient is φ = 22156006528.

The previous prime is 66468019771. The next prime is 66468019777. The reversal of 66468019776 is 67791086466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66468019771) 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, 173093610 + ... + 173093993.

It is an arithmetic number, because the mean of its divisors is an integer number (6280832244).

Almost surely, 2^66468019776 is an apocalyptic number.

It is an amenable number.

66468019776 is an abundant number, since it is smaller than the sum of its proper divisors (109395283056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66468019776 is a wasteful number, since it uses less digits than its factorization.

66468019776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346187618 (or 346187608 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 66468019776 in words is "sixty-six billion, four hundred sixty-eight million, nineteen thousand, seven hundred seventy-six".