1728103800666 has 64 divisors (see below), whose sum is σ = 3701629900800. Its totient is φ = 536254992000.

The previous prime is 1728103800653. The next prime is 1728103800673. The reversal of 1728103800666 is 6660083018271.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1445566 + ... + 2354966.

It is an arithmetic number, because the mean of its divisors is an integer number (57837967200).

Almost surely, 2^{1728103800666} is an apocalyptic number.

1728103800666 is an abundant number, since it is smaller than the sum of its proper divisors (1973526100134).

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

1728103800666 is a wasteful number, since it uses less digits than its factorization.

1728103800666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909715.

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 1728103800666 in words is "one trillion, seven hundred twenty-eight billion, one hundred three million, eight hundred thousand, six hundred sixty-six".