2728203273666 has 192 divisors, whose sum is σ = 6679632960000. Its totient is φ = 798926768640.

The previous prime is 2728203273641. The next prime is 2728203273671. The reversal of 2728203273666 is 6663723028272.

2728203273666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 354354285 + ... + 354361983.

It is an arithmetic number, because the mean of its divisors is an integer number (34789755000).

Almost surely, 2^{2728203273666} is an apocalyptic number.

2728203273666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2728203273666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3339816480000).

2728203273666 is an abundant number, since it is smaller than the sum of its proper divisors (3951429686334).

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

2728203273666 is a wasteful number, since it uses less digits than its factorization.

2728203273666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489 (or 8486 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 2728203273666 in words is "two trillion, seven hundred twenty-eight billion, two hundred three million, two hundred seventy-three thousand, six hundred sixty-six".