6605565312 has 128 divisors (see below), whose sum is σ = 18163768320. Its totient is φ = 2124748800.

The previous prime is 6605565259. The next prime is 6605565347. The reversal of 6605565312 is 2135655066.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6225262 + ... + 6226322.

It is an arithmetic number, because the mean of its divisors is an integer number (141904440).

Almost surely, 2^6605565312 is an apocalyptic number.

6605565312 is a gapful number since it is divisible by the number (62) 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 6605565312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9081884160).

6605565312 is an abundant number, since it is smaller than the sum of its proper divisors (11558203008).

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

6605565312 is a wasteful number, since it uses less digits than its factorization.

6605565312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 6605565312 is about 81274.6289563970. The cubic root of 6605565312 is about 1876.3045439487.

The spelling of 6605565312 in words is "six billion, six hundred five million, five hundred sixty-five thousand, three hundred twelve".