66667128004 has 24 divisors (see below), whose sum is σ = 119165655168. Its totient is φ = 32619987360.

The previous prime is 66667128001. The next prime is 66667128019. The reversal of 66667128004 is 40082176666.

66667128004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66667128001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1737127 + ... + 1775089.

It is an arithmetic number, because the mean of its divisors is an integer number (4965235632).

Almost surely, 2^66667128004 is an apocalyptic number.

It is an amenable number.

66667128004 is a deficient number, since it is larger than the sum of its proper divisors (52498527164).

66667128004 is a wasteful number, since it uses less digits than its factorization.

66667128004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47355 (or 47353 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 66667128004 in words is "sixty-six billion, six hundred sixty-seven million, one hundred twenty-eight thousand, four".