16661130307205 has 8 divisors (see below), whose sum is σ = 20004042299904. Its totient is φ = 13321780291600.

The previous prime is 16661130307189. The next prime is 16661130307249. The reversal of 16661130307205 is 50270303116661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16661130307205 - 2⁴ = 16661130307189 is a prime.

It is a super-2 number, since 2×16661130307205² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890483981 + ... + 890502690.

It is an arithmetic number, because the mean of its divisors is an integer number (2500505287488).

Almost surely, 2^{16661130307205} is an apocalyptic number.

It is an amenable number.

16661130307205 is a deficient number, since it is larger than the sum of its proper divisors (3342911992699).

16661130307205 is a wasteful number, since it uses less digits than its factorization.

16661130307205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780988547.

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 16661130307205 in words is "sixteen trillion, six hundred sixty-one billion, one hundred thirty million, three hundred seven thousand, two hundred five".