80666668712 has 16 divisors (see below), whose sum is σ = 172857147360. Its totient is φ = 34571429424.

The previous prime is 80666668661. The next prime is 80666668721. The reversal of 80666668712 is 21786666608.

It is a happy number.

It is a super-2 number, since 2×80666668712² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 1440476227 = 80666668712 / (8 + 0 + 6 + 6 + 6 + 6 + 6 + 8 + 7 + 1 + 2).

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, 720238058 + ... + 720238169.

It is an arithmetic number, because the mean of its divisors is an integer number (10803571710).

Almost surely, 2^80666668712 is an apocalyptic number.

It is an amenable number.

80666668712 is an abundant number, since it is smaller than the sum of its proper divisors (92190478648).

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

80666668712 is a wasteful number, since it uses less digits than its factorization.

80666668712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440476240 (or 1440476236 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 80666668712 in words is "eighty billion, six hundred sixty-six million, six hundred sixty-eight thousand, seven hundred twelve".