6666446666 has 32 divisors (see below), whose sum is σ = 11491891200. Its totient is φ = 2868464880.

The previous prime is 6666446653. The next prime is 6666446681.

It is a happy number.

6666446666 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6666446666² = 88883022301245031112, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595961 + ... + 607043.

It is an arithmetic number, because the mean of its divisors is an integer number (359121600).

Almost surely, 2^6666446666 is an apocalyptic number.

6666446666 is a deficient number, since it is larger than the sum of its proper divisors (4825444534).

6666446666 is a wasteful number, since it uses less digits than its factorization.

6666446666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554.

The product of its digits is 26873856, while the sum is 56.

The square root of 6666446666 is about 81648.3108582168. The cubic root of 6666446666 is about 1882.0513546789.

The spelling of 6666446666 in words is "six billion, six hundred sixty-six million, four hundred forty-six thousand, six hundred sixty-six".