66773700440 has 32 divisors (see below), whose sum is σ = 153905240160. Its totient is φ = 26058028800.

The previous prime is 66773700421. The next prime is 66773700467. The reversal of 66773700440 is 4400737766.

66773700440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66773700391 and 66773700400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20356196 + ... + 20359475.

It is an arithmetic number, because the mean of its divisors is an integer number (4809538755).

Almost surely, 2^66773700440 is an apocalyptic number.

It is an amenable number.

66773700440 is an abundant number, since it is smaller than the sum of its proper divisors (87131539720).

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

66773700440 is a wasteful number, since it uses less digits than its factorization.

66773700440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40715723 (or 40715719 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 44.

The spelling of 66773700440 in words is "sixty-six billion, seven hundred seventy-three million, seven hundred thousand, four hundred forty".