6667066656 has 72 divisors (see below), whose sum is σ = 19000800000. Its totient is φ = 2217511296.

The previous prime is 6667066639. The next prime is 6667066669. The reversal of 6667066656 is 6566607666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108345 + ... + 158343.

It is an arithmetic number, because the mean of its divisors is an integer number (263900000).

Almost surely, 2^6667066656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6667066656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9500400000).

6667066656 is an abundant number, since it is smaller than the sum of its proper divisors (12333733344).

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

6667066656 is a wasteful number, since it uses less digits than its factorization.

6667066656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50478 (or 50467 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 54.

The square root of 6667066656 is about 81652.1074804564. The cubic root of 6667066656 is about 1882.1096974467.

The spelling of 6667066656 in words is "six billion, six hundred sixty-seven million, sixty-six thousand, six hundred fifty-six".