1666072944 has 60 divisors (see below), whose sum is σ = 4718901096. Its totient is φ = 548662656.

The previous prime is 1666072937. The next prime is 1666072999. The reversal of 1666072944 is 4492706661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666072944.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57747 + ... + 81650.

Almost surely, 2^1666072944 is an apocalyptic number.

It is an amenable number.

1666072944 is an abundant number, since it is smaller than the sum of its proper divisors (3052828152).

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

1666072944 is a wasteful number, since it uses less digits than its factorization.

1666072944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139494 (or 139485 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1666072944 is about 40817.5568107647. The cubic root of 1666072944 is about 1185.4902975638.

The spelling of 1666072944 in words is "one billion, six hundred sixty-six million, seventy-two thousand, nine hundred forty-four".