8006666680 has 16 divisors (see below), whose sum is σ = 18015000120. Its totient is φ = 3202666656.

The previous prime is 8006666659. The next prime is 8006666713. The reversal of 8006666680 is 866666008.

It is a super-2 number, since 2×8006666680² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8006666680.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100083294 + ... + 100083373.

Almost surely, 2^8006666680 is an apocalyptic number.

It is an amenable number.

8006666680 is an abundant number, since it is smaller than the sum of its proper divisors (10008333440).

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

8006666680 is a wasteful number, since it uses less digits than its factorization.

8006666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200166678 (or 200166674 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 8006666680 is about 89479.9792132296. The cubic root of 8006666680 is about 2000.5554024165. Note that the first 3 decimals are identical.

The spelling of 8006666680 in words is "eight billion, six million, six hundred sixty-six thousand, six hundred eighty".