16651666010550 has 48 divisors (see below), whose sum is σ = 41296435519680. Its totient is φ = 4440411601440.

The previous prime is 16651666010531. The next prime is 16651666010557. The reversal of 16651666010550 is 5501066615661.

It is a super-2 number, since 2×16651666010550² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16651666010550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651666010557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25516629 + ... + 26161071.

It is an arithmetic number, because the mean of its divisors is an integer number (860342406660).

Almost surely, 2^{16651666010550} is an apocalyptic number.

16651666010550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16651666010550 is an abundant number, since it is smaller than the sum of its proper divisors (24644769509130).

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

16651666010550 is a wasteful number, since it uses less digits than its factorization.

16651666010550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816717 (or 816712 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 16651666010550 in words is "sixteen trillion, six hundred fifty-one billion, six hundred sixty-six million, ten thousand, five hundred fifty".