66746428727208 has 16 divisors (see below), whose sum is σ = 166866071818080. Its totient is φ = 22248809575728.

The previous prime is 66746428727159. The next prime is 66746428727309. The reversal of 66746428727208 is 80272782464766.

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, 1390550598460 + ... + 1390550598507.

It is an arithmetic number, because the mean of its divisors is an integer number (10429129488630).

Almost surely, 2^{66746428727208} is an apocalyptic number.

It is an amenable number.

66746428727208 is an abundant number, since it is smaller than the sum of its proper divisors (100119643090872).

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

66746428727208 is a wasteful number, since it uses less digits than its factorization.

66746428727208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781101196976 (or 2781101196972 counting only the distinct ones).

The product of its (nonzero) digits is 606928896, while the sum is 69.

The spelling of 66746428727208 in words is "sixty-six trillion, seven hundred forty-six billion, four hundred twenty-eight million, seven hundred twenty-seven thousand, two hundred eight".