6666664444 has 96 divisors (see below), whose sum is σ = 14516409600. Its totient is φ = 2638863360.

The previous prime is 6666664429. The next prime is 6666664447. The reversal of 6666664444 is 4444666666.

It is a happy number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666664391 and 6666664400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666664447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 605662 + ... + 616570.

It is an arithmetic number, because the mean of its divisors is an integer number (151212600).

It is a self-describing number.

Almost surely, 2^6666664444 is an apocalyptic number.

It is an amenable number.

6666664444 is an abundant number, since it is smaller than the sum of its proper divisors (7849745156).

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

6666664444 is a wasteful number, since it uses less digits than its factorization.

6666664444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003 (or 11001 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 52.

The square root of 6666664444 is about 81649.6444817735. The cubic root of 6666664444 is about 1882.0718486011.

The spelling of 6666664444 in words is "six billion, six hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-four".