6666644444 has 24 divisors (see below), whose sum is σ = 11995359936. Its totient is φ = 3240000000.

The previous prime is 6666644431. The next prime is 6666644473. The reversal of 6666644444 is 4444466666.

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 = 6666644392 and 6666644401.

It is a congruent number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30557 + ... + 119444.

It is an arithmetic number, because the mean of its divisors is an integer number (499806664).

Almost surely, 2^6666644444 is an apocalyptic number.

It is an amenable number.

6666644444 is a deficient number, since it is larger than the sum of its proper divisors (5328715492).

6666644444 is a wasteful number, since it uses less digits than its factorization.

6666644444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150317 (or 150315 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 50.

The square root of 6666644444 is about 81649.5220071741. The cubic root of 6666644444 is about 1882.0699665267.

The spelling of 6666644444 in words is "six billion, six hundred sixty-six million, six hundred forty-four thousand, four hundred forty-four".