16665090912 has 288 divisors, whose sum is σ = 52009776000. Its totient is φ = 5043271680.

The previous prime is 16665090907. The next prime is 16665090943. The reversal of 16665090912 is 21909056661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13236139 + ... + 13237397.

It is an arithmetic number, because the mean of its divisors is an integer number (180589500).

Almost surely, 2^16665090912 is an apocalyptic number.

16665090912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16665090912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26004888000).

16665090912 is an abundant number, since it is smaller than the sum of its proper divisors (35344685088).

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

16665090912 is a wasteful number, since it uses less digits than its factorization.

16665090912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 16665090912 in words is "sixteen billion, six hundred sixty-five million, ninety thousand, nine hundred twelve".