66445440116 has 24 divisors (see below), whose sum is σ = 127487841600. Its totient is φ = 30050697600.

The previous prime is 66445440109. The next prime is 66445440133. The reversal of 66445440116 is 61104454466.

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, 3785525 + ... + 3803036.

It is an arithmetic number, because the mean of its divisors is an integer number (5311993400).

Almost surely, 2^66445440116 is an apocalyptic number.

It is an amenable number.

66445440116 is a deficient number, since it is larger than the sum of its proper divisors (61042401484).

66445440116 is a wasteful number, since it uses less digits than its factorization.

66445440116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7588775 (or 7588773 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 66445440116 in words is "sixty-six billion, four hundred forty-five million, four hundred forty thousand, one hundred sixteen".