66578146844 has 12 divisors (see below), whose sum is σ = 127103734968. Its totient is φ = 30262794000.

The previous prime is 66578146841. The next prime is 66578146889. The reversal of 66578146844 is 44864187566.

66578146844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66578146841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756569807 + ... + 756569894.

It is an arithmetic number, because the mean of its divisors is an integer number (10591977914).

Almost surely, 2^66578146844 is an apocalyptic number.

It is an amenable number.

66578146844 is a deficient number, since it is larger than the sum of its proper divisors (60525588124).

66578146844 is a wasteful number, since it uses less digits than its factorization.

66578146844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513139716 (or 1513139714 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 59.

The spelling of 66578146844 in words is "sixty-six billion, five hundred seventy-eight million, one hundred forty-six thousand, eight hundred forty-four".