16605666016660 has 48 divisors (see below), whose sum is σ = 40506936140160. Its totient is φ = 5600037248640.

The previous prime is 16605666016657. The next prime is 16605666016679. The reversal of 16605666016660 is 6661066650661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972220150 + ... + 972237229.

It is an arithmetic number, because the mean of its divisors is an integer number (843894502920).

Almost surely, 2^{16605666016660} is an apocalyptic number.

16605666016660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16605666016660 is an abundant number, since it is smaller than the sum of its proper divisors (23901270123500).

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

16605666016660 is a wasteful number, since it uses less digits than its factorization.

16605666016660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944457456 (or 1944457454 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 16605666016660 in words is "sixteen trillion, six hundred five billion, six hundred sixty-six million, sixteen thousand, six hundred sixty".