66756647466056 has 16 divisors (see below), whose sum is σ = 127530387848700. Its totient is φ = 32748544039744.

The previous prime is 66756647466031. The next prime is 66756647466149. The reversal of 66756647466056 is 65066474665766.

66756647466056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 66536812140100 + 219835325956 = 8157010^2 + 468866^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78722461211 + ... + 78722462058.

Almost surely, 2^{66756647466056} is an apocalyptic number.

It is an amenable number.

66756647466056 is a deficient number, since it is larger than the sum of its proper divisors (60773740382644).

66756647466056 is a wasteful number, since it uses less digits than its factorization.

66756647466056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157444923328 (or 157444923324 counting only the distinct ones).

The product of its (nonzero) digits is 5486745600, while the sum is 74.

The spelling of 66756647466056 in words is "sixty-six trillion, seven hundred fifty-six billion, six hundred forty-seven million, four hundred sixty-six thousand, fifty-six".