665808744 has 16 divisors (see below), whose sum is σ = 1664521920. Its totient is φ = 221936240.

The previous prime is 665808739. The next prime is 665808763. The reversal of 665808744 is 447808566.

It is a junction number, because it is equal to n+sod(n) for n = 665808693 and 665808702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13870992 + ... + 13871039.

It is an arithmetic number, because the mean of its divisors is an integer number (104032620).

Almost surely, 2^665808744 is an apocalyptic number.

It is an amenable number.

665808744 is an abundant number, since it is smaller than the sum of its proper divisors (998713176).

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

665808744 is a wasteful number, since it uses less digits than its factorization.

665808744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27742040 (or 27742036 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 665808744 is about 25803.2700253282. The cubic root of 665808744 is about 873.2055716347.

The spelling of 665808744 in words is "six hundred sixty-five million, eight hundred eight thousand, seven hundred forty-four".