665827344 has 160 divisors (see below), whose sum is σ = 2352349440. Its totient is φ = 175592448.

The previous prime is 665827343. The next prime is 665827361. The reversal of 665827344 is 443728566.

665827344 is a `hidden beast` number, since 66 + 582 + 7 + 3 + 4 + 4 = 666.

665827344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 665827344.

It is not an unprimeable number, because it can be changed into a prime (665827343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30844 + ... + 47780.

It is an arithmetic number, because the mean of its divisors is an integer number (14702184).

Almost surely, 2^665827344 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 665827344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176174720).

665827344 is an abundant number, since it is smaller than the sum of its proper divisors (1686522096).

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

665827344 is a wasteful number, since it uses less digits than its factorization.

665827344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16974 (or 16962 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 665827344 is about 25803.6304422459. The cubic root of 665827344 is about 873.2137028348.

The spelling of 665827344 in words is "six hundred sixty-five million, eight hundred twenty-seven thousand, three hundred forty-four".