6616885313664 has 320 divisors, whose sum is σ = 20536614067200. Its totient is φ = 2112464240640.

The previous prime is 6616885313651. The next prime is 6616885313693. The reversal of 6616885313664 is 4663135886166.

6616885313664 is a `hidden beast` number, since 6 + 6 + 1 + 6 + 8 + 8 + 531 + 36 + 64 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31070457 + ... + 31282695.

It is an arithmetic number, because the mean of its divisors is an integer number (64176918960).

Almost surely, 2^{6616885313664} is an apocalyptic number.

6616885313664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6616885313664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10268307033600).

6616885313664 is an abundant number, since it is smaller than the sum of its proper divisors (13919728753536).

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

6616885313664 is a wasteful number, since it uses less digits than its factorization.

6616885313664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212393 (or 212372 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

The spelling of 6616885313664 in words is "six trillion, six hundred sixteen billion, eight hundred eighty-five million, three hundred thirteen thousand, six hundred sixty-four".