16662289444 has 12 divisors (see below), whose sum is σ = 29231725068. Its totient is φ = 8310368000.

The previous prime is 16662289421. The next prime is 16662289481. The reversal of 16662289444 is 44498226661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10340449344 + 6321840100 = 101688^2 + 79510^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16662289391 and 16662289400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5192377 + ... + 5195584.

It is an arithmetic number, because the mean of its divisors is an integer number (2435977089).

Almost surely, 2^16662289444 is an apocalyptic number.

It is an amenable number.

16662289444 is a deficient number, since it is larger than the sum of its proper divisors (12569435624).

16662289444 is a wasteful number, since it uses less digits than its factorization.

16662289444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388366 (or 10388364 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 52.

The spelling of 16662289444 in words is "sixteen billion, six hundred sixty-two million, two hundred eighty-nine thousand, four hundred forty-four".