6657538896 has 180 divisors, whose sum is σ = 19913912928. Its totient is φ = 2075704704.

The previous prime is 6657538891. The next prime is 6657538897. The reversal of 6657538896 is 6988357566.

6657538896 is a `hidden beast` number, since 6 + 6 + 5 + 7 + 538 + 8 + 96 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657538891) 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 35 ways as a sum of consecutive naturals, for example, 4313901 + ... + 4315443.

Almost surely, 2^6657538896 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 6657538896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9956956464).

6657538896 is an abundant number, since it is smaller than the sum of its proper divisors (13256374032).

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

6657538896 is a wasteful number, since it uses less digits than its factorization.

6657538896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1650 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 63.

The square root of 6657538896 is about 81593.7429954038. The cubic root of 6657538896 is about 1881.2127093398.

The spelling of 6657538896 in words is "six billion, six hundred fifty-seven million, five hundred thirty-eight thousand, eight hundred ninety-six".