6666020712 has 192 divisors, whose sum is σ = 20282895360. Its totient is φ = 2038867200.

The previous prime is 6666020687. The next prime is 6666020719. The reversal of 6666020712 is 2170206666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6666020719) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4826262 + ... + 4827642.

It is an arithmetic number, because the mean of its divisors is an integer number (105640080).

Almost surely, 2^6666020712 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 6666020712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10141447680).

6666020712 is an abundant number, since it is smaller than the sum of its proper divisors (13616874648).

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

6666020712 is a wasteful number, since it uses less digits than its factorization.

6666020712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 1590 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 6666020712 is about 81645.7023486233. The cubic root of 6666020712 is about 1882.0112691372.

The spelling of 6666020712 in words is "six billion, six hundred sixty-six million, twenty thousand, seven hundred twelve".