6666550066 has 64 divisors (see below), whose sum is σ = 11353737600. Its totient is φ = 2909836800.

The previous prime is 6666550063. The next prime is 6666550067. The reversal of 6666550066 is 6600556666.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666549998 and 6666550025.

It is not an unprimeable number, because it can be changed into a prime (6666550063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21298726 + ... + 21299038.

It is an arithmetic number, because the mean of its divisors is an integer number (177402150).

Almost surely, 2^6666550066 is an apocalyptic number.

6666550066 is a deficient number, since it is larger than the sum of its proper divisors (4687187534).

6666550066 is a wasteful number, since it uses less digits than its factorization.

6666550066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The square root of 6666550066 is about 81648.9440593080. The cubic root of 6666550066 is about 1882.0610851553.

The spelling of 6666550066 in words is "six billion, six hundred sixty-six million, five hundred fifty thousand, sixty-six".