8066666680 has 32 divisors (see below), whose sum is σ = 18775864800. Its totient is φ = 3115401856.

The previous prime is 8066666677. The next prime is 8066666693. The reversal of 8066666680 is 866666608.

It is a super-2 number, since 2×8066666680² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3475852 + ... + 3478171.

It is an arithmetic number, because the mean of its divisors is an integer number (586745775).

Almost surely, 2^8066666680 is an apocalyptic number.

It is an amenable number.

8066666680 is an abundant number, since it is smaller than the sum of its proper divisors (10709198120).

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

8066666680 is a wasteful number, since it uses less digits than its factorization.

8066666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954063 (or 6954059 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 8066666680 is about 89814.6239762768. The cubic root of 8066666680 is about 2005.5401956122.

The spelling of 8066666680 in words is "eight billion, sixty-six million, six hundred sixty-six thousand, six hundred eighty".