1665038044 has 12 divisors (see below), whose sum is σ = 2984885568. Its totient is φ = 812213600.

The previous prime is 1665038041. The next prime is 1665038059. The reversal of 1665038044 is 4408305661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1665037994 and 1665038012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665038041) by changing a digit.

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, 5076172 + ... + 5076499.

It is an arithmetic number, because the mean of its divisors is an integer number (248740464).

Almost surely, 2^1665038044 is an apocalyptic number.

It is an amenable number.

1665038044 is a deficient number, since it is larger than the sum of its proper divisors (1319847524).

1665038044 is a wasteful number, since it uses less digits than its factorization.

1665038044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10152716 (or 10152714 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1665038044 is about 40804.8776986281. The cubic root of 1665038044 is about 1185.2447864998.

The spelling of 1665038044 in words is "one billion, six hundred sixty-five million, thirty-eight thousand, forty-four".