66067373728 has 24 divisors (see below), whose sum is σ = 130076507988. Its totient is φ = 33032070144.

The previous prime is 66067373711. The next prime is 66067373731. The reversal of 66067373728 is 82737376066.

66067373728 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 65386581264 + 680792464 = 255708^2 + 26092^2 .

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, 873550 + ... + 946162.

Almost surely, 2^66067373728 is an apocalyptic number.

It is an amenable number.

66067373728 is a deficient number, since it is larger than the sum of its proper divisors (64009134260).

66067373728 is a wasteful number, since it uses less digits than its factorization.

66067373728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101056 (or 101048 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 66067373728 in words is "sixty-six billion, sixty-seven million, three hundred seventy-three thousand, seven hundred twenty-eight".