8016666720 has 96 divisors (see below), whose sum is σ = 25451532288. Its totient is φ = 2120928768.

The previous prime is 8016666683. The next prime is 8016666731. The reversal of 8016666720 is 276666108.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4794 + ... + 126713.

It is an arithmetic number, because the mean of its divisors is an integer number (265120128).

Almost surely, 2^8016666720 is an apocalyptic number.

8016666720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8016666720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12725766144).

8016666720 is an abundant number, since it is smaller than the sum of its proper divisors (17434865568).

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

8016666720 is a wasteful number, since it uses less digits than its factorization.

8016666720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131652 (or 131644 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 8016666720 is about 89535.8404215876. The cubic root of 8016666720 is about 2001.3879299358.

The spelling of 8016666720 in words is "eight billion, sixteen million, six hundred sixty-six thousand, seven hundred twenty".