6611559944 has 64 divisors (see below), whose sum is σ = 14439997440. Its totient is φ = 2807703360.

The previous prime is 6611559887. The next prime is 6611559949. The reversal of 6611559944 is 4499551166.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6611559892 and 6611559901.

It is not an unprimeable number, because it can be changed into a prime (6611559949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49049 + ... + 125015.

It is an arithmetic number, because the mean of its divisors is an integer number (225624960).

Almost surely, 2^6611559944 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 6611559944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7219998720).

6611559944 is an abundant number, since it is smaller than the sum of its proper divisors (7828437496).

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

6611559944 is a wasteful number, since it uses less digits than its factorization.

6611559944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76050 (or 76046 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 6611559944 is about 81311.4994573338. The cubic root of 6611559944 is about 1876.8719621762.

The spelling of 6611559944 in words is "six billion, six hundred eleven million, five hundred fifty-nine thousand, nine hundred forty-four".