6660169664 has 56 divisors (see below), whose sum is σ = 13403445888. Its totient is φ = 3283096320.

The previous prime is 6660169603. The next prime is 6660169669. The reversal of 6660169664 is 4669610666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660169669) 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 7 ways as a sum of consecutive naturals, for example, 3350879 + ... + 3352865.

It is an arithmetic number, because the mean of its divisors is an integer number (239347248).

Almost surely, 2^6660169664 is an apocalyptic number.

6660169664 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 6660169664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6701722944).

6660169664 is an abundant number, since it is smaller than the sum of its proper divisors (6743276224).

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

6660169664 is a wasteful number, since it uses less digits than its factorization.

6660169664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713 (or 2703 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 50.

The square root of 6660169664 is about 81609.8625412395. The cubic root of 6660169664 is about 1881.4604676850.

The spelling of 6660169664 in words is "six billion, six hundred sixty million, one hundred sixty-nine thousand, six hundred sixty-four".