66664444404 has 24 divisors (see below), whose sum is σ = 157090475808. Its totient is φ = 22001466400.

The previous prime is 66664444403. The next prime is 66664444409. The reversal of 66664444404 is 40444446666.

66664444404 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 (66664444403) 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, 27500622 + ... + 27503045.

It is an arithmetic number, because the mean of its divisors is an integer number (6545436492).

Almost surely, 2^66664444404 is an apocalyptic number.

It is an amenable number.

66664444404 is an abundant number, since it is smaller than the sum of its proper divisors (90426031404).

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

66664444404 is a wasteful number, since it uses less digits than its factorization.

66664444404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55003775 (or 55003773 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 66664444404 in words is "sixty-six billion, six hundred sixty-four million, four hundred forty-four thousand, four hundred four".