66446604204 has 12 divisors (see below), whose sum is σ = 155042076504. Its totient is φ = 22148868064.

The previous prime is 66446604199. The next prime is 66446604221. The reversal of 66446604204 is 40240664466.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2768608497 + ... + 2768608520.

It is an arithmetic number, because the mean of its divisors is an integer number (12920173042).

Almost surely, 2^66446604204 is an apocalyptic number.

It is an amenable number.

66446604204 is an abundant number, since it is smaller than the sum of its proper divisors (88595472300).

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

66446604204 is a wasteful number, since it uses less digits than its factorization.

66446604204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537217024 (or 5537217022 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 66446604204 in words is "sixty-six billion, four hundred forty-six million, six hundred four thousand, two hundred four".