6606542500 has 60 divisors (see below), whose sum is σ = 14483810572. Its totient is φ = 2635920000.

The previous prime is 6606542491. The next prime is 6606542507. The reversal of 6606542500 is 52456066.

It can be written as a sum of positive squares in 10 ways, for example, as 5303043684 + 1303498816 = 72822^2 + 36104^2 .

It is not an unprimeable number, because it can be changed into a prime (6606542507) 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 19 ways as a sum of consecutive naturals, for example, 1049362 + ... + 1055638.

Almost surely, 2^6606542500 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 6606542500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7241905286).

6606542500 is an abundant number, since it is smaller than the sum of its proper divisors (7877268072).

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

6606542500 is a wasteful number, since it uses less digits than its factorization.

6606542500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722 (or 6705 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 6606542500 is about 81280.6403764144. The cubic root of 6606542500 is about 1876.3970624939.

Adding to 6606542500 its reverse (52456066), we get a palindrome (6658998566).

The spelling of 6606542500 in words is "six billion, six hundred six million, five hundred forty-two thousand, five hundred".