66744404004400 has 60 divisors (see below), whose sum is σ = 160381357685152. Its totient is φ = 26693111934720.

The previous prime is 66744404004301. The next prime is 66744404004457. The reversal of 66744404004400 is 440040444766.

66744404004400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 12230139 + ... + 16824538.

Almost surely, 2^{66744404004400} is an apocalyptic number.

It is an amenable number.

66744404004400 is an abundant number, since it is smaller than the sum of its proper divisors (93636953680752).

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

66744404004400 is a wasteful number, since it uses less digits than its factorization.

66744404004400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29060438 (or 29060427 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 43.

The spelling of 66744404004400 in words is "sixty-six trillion, seven hundred forty-four billion, four hundred four million, four thousand, four hundred".