16665889446 has 24 divisors (see below), whose sum is σ = 38233511784. Its totient is φ = 5228514240.

The previous prime is 16665889423. The next prime is 16665889451. The reversal of 16665889446 is 64498856661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27231540 + ... + 27232151.

It is an arithmetic number, because the mean of its divisors is an integer number (1593062991).

Almost surely, 2^16665889446 is an apocalyptic number.

16665889446 is an abundant number, since it is smaller than the sum of its proper divisors (21567622338).

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

16665889446 is a wasteful number, since it uses less digits than its factorization.

16665889446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54463716 (or 54463713 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 16665889446 in words is "sixteen billion, six hundred sixty-five million, eight hundred eighty-nine thousand, four hundred forty-six".