66055221216516 has 48 divisors (see below), whose sum is σ = 176748441819264. Its totient is φ = 18808507643136.

The previous prime is 66055221216511. The next prime is 66055221216547. The reversal of 66055221216516 is 61561212255066.

66055221216516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66055221216511) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1341906585 + ... + 1341955808.

It is an arithmetic number, because the mean of its divisors is an integer number (3682259204568).

Almost surely, 2^{66055221216516} is an apocalyptic number.

It is an amenable number.

66055221216516 is an abundant number, since it is smaller than the sum of its proper divisors (110693220602748).

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

66055221216516 is a wasteful number, since it uses less digits than its factorization.

66055221216516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683862700 (or 2683862698 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 66055221216516 in words is "sixty-six trillion, fifty-five billion, two hundred twenty-one million, two hundred sixteen thousand, five hundred sixteen".