665056244 has 12 divisors (see below), whose sum is σ = 1192235268. Its totient is φ = 324417600.

The previous prime is 665056213. The next prime is 665056267. The reversal of 665056244 is 442650566.

It can be written as a sum of positive squares in 2 ways, for example, as 49420900 + 615635344 = 7030^2 + 24812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665056198 and 665056207.

It is a congruent number.

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, 2027447 + ... + 2027774.

It is an arithmetic number, because the mean of its divisors is an integer number (99352939).

Almost surely, 2^665056244 is an apocalyptic number.

It is an amenable number.

665056244 is a deficient number, since it is larger than the sum of its proper divisors (527179024).

665056244 is a wasteful number, since it uses less digits than its factorization.

665056244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055266 (or 4055264 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 665056244 is about 25788.6844177829. The cubic root of 665056244 is about 872.8764806849.

The spelling of 665056244 in words is "six hundred sixty-five million, fifty-six thousand, two hundred forty-four".