6666000080 has 20 divisors (see below), whose sum is σ = 15498450372. Its totient is φ = 2666400000.

The previous prime is 6666000079. The next prime is 6666000157. The reversal of 6666000080 is 800006666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3430210624 + 3235789456 = 58568^2 + 56884^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41662421 + ... + 41662580.

Almost surely, 2^6666000080 is an apocalyptic number.

It is an amenable number.

6666000080 is an abundant number, since it is smaller than the sum of its proper divisors (8832450292).

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

6666000080 is a wasteful number, since it uses less digits than its factorization.

6666000080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83325014 (or 83325008 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6666000080 is about 81645.5759977232. The cubic root of 6666000080 is about 1882.0093274643.

The spelling of 6666000080 in words is "six billion, six hundred sixty-six million, eighty", and thus it is an aban number.