6616645632 has 216 divisors, whose sum is σ = 19629267840. Its totient is φ = 2146959360.

The previous prime is 6616645619. The next prime is 6616645649. The reversal of 6616645632 is 2365466166.

6616645632 is a `hidden beast` number, since 6 + 6 + 1 + 6 + 6 + 4 + 5 + 632 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83754969 + ... + 83755047.

It is an arithmetic number, because the mean of its divisors is an integer number (90876240).

Almost surely, 2^6616645632 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 6616645632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9814633920).

6616645632 is an abundant number, since it is smaller than the sum of its proper divisors (13012622208).

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

6616645632 is an frugal number, since it uses more digits than its factorization.

6616645632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 155 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 6616645632 is about 81342.7663163726. The cubic root of 6616645632 is about 1877.3530760091.

The spelling of 6616645632 in words is "six billion, six hundred sixteen million, six hundred forty-five thousand, six hundred thirty-two".