66548371712 has 18 divisors (see below), whose sum is σ = 132836789358. Its totient is φ = 33274185728.

The previous prime is 66548371711. The next prime is 66548371733. The reversal of 66548371712 is 21717384566.

66548371712 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 only one way, i.e., 48865755136 + 17682616576 = 221056^2 + 132976^2 .

It is not an unprimeable number, because it can be changed into a prime (66548371711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129977033 + ... + 129977544.

It is an arithmetic number, because the mean of its divisors is an integer number (7379821631).

Almost surely, 2^66548371712 is an apocalyptic number.

It is an amenable number.

66548371712 is a deficient number, since it is larger than the sum of its proper divisors (66288417646).

66548371712 is an equidigital number, since it uses as much as digits as its factorization.

66548371712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259954593 (or 259954579 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The spelling of 66548371712 in words is "sixty-six billion, five hundred forty-eight million, three hundred seventy-one thousand, seven hundred twelve".