66661447204 has 12 divisors (see below), whose sum is σ = 127262762928. Its totient is φ = 30300657800.

The previous prime is 66661447189. The next prime is 66661447231. The reversal of 66661447204 is 40274416666.

66661447204 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757516402 + ... + 757516489.

It is an arithmetic number, because the mean of its divisors is an integer number (10605230244).

Almost surely, 2^66661447204 is an apocalyptic number.

It is an amenable number.

66661447204 is a deficient number, since it is larger than the sum of its proper divisors (60601315724).

66661447204 is a wasteful number, since it uses less digits than its factorization.

66661447204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515032906 (or 1515032904 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 66661447204 in words is "sixty-six billion, six hundred sixty-one million, four hundred forty-seven thousand, two hundred four".