66741881884768 has 24 divisors (see below), whose sum is σ = 131412039767568. Its totient is φ = 33367395594624.

The previous prime is 66741881884693. The next prime is 66741881884781. The reversal of 66741881884768 is 86748818814766.

It is a junction number, because it is equal to n+sod(n) for n = 66741881884691 and 66741881884700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110486196 + ... + 111088627.

It is an arithmetic number, because the mean of its divisors is an integer number (5475501656982).

Almost surely, 2^{66741881884768} is an apocalyptic number.

It is an amenable number.

66741881884768 is a deficient number, since it is larger than the sum of its proper divisors (64670157882800).

66741881884768 is a wasteful number, since it uses less digits than its factorization.

66741881884768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221584246 (or 221584238 counting only the distinct ones).

The product of its digits is 5549064192, while the sum is 82.

The spelling of 66741881884768 in words is "sixty-six trillion, seven hundred forty-one billion, eight hundred eighty-one million, eight hundred eighty-four thousand, seven hundred sixty-eight".