6661659084 has 96 divisors (see below), whose sum is σ = 16725273600. Its totient is φ = 2057348160.

The previous prime is 6661659077. The next prime is 6661659089. The reversal of 6661659084 is 4809561666.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6661659089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2837199 + ... + 2839545.

It is an arithmetic number, because the mean of its divisors is an integer number (174221600).

Almost surely, 2^6661659084 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 6661659084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8362636800).

6661659084 is an abundant number, since it is smaller than the sum of its proper divisors (10063614516).

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

6661659084 is a wasteful number, since it uses less digits than its factorization.

6661659084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2641 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 6661659084 is about 81618.9872762460. The cubic root of 6661659084 is about 1881.6007081556.

The spelling of 6661659084 in words is "six billion, six hundred sixty-one million, six hundred fifty-nine thousand, eighty-four".