2666766128 has 40 divisors (see below), whose sum is σ = 5857177200. Its totient is φ = 1166033664.

The previous prime is 2666766127. The next prime is 2666766169. The reversal of 2666766128 is 8216676662.

It is a happy number.

It is a super-2 number, since 2×2666766128² = 14223283162896224768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666766127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333443 + ... + 341346.

It is an arithmetic number, because the mean of its divisors is an integer number (146429430).

Almost surely, 2^2666766128 is an apocalyptic number.

It is an amenable number.

2666766128 is an abundant number, since it is smaller than the sum of its proper divisors (3190411072).

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

2666766128 is a wasteful number, since it uses less digits than its factorization.

2666766128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674829 (or 674823 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 2666766128 is about 51640.7409706716. The cubic root of 2666766128 is about 1386.7397891461.

The spelling of 2666766128 in words is "two billion, six hundred sixty-six million, seven hundred sixty-six thousand, one hundred twenty-eight".