1666741854688 has 12 divisors (see below), whose sum is σ = 3281398026480. Its totient is φ = 833370927328.

The previous prime is 1666741854593. The next prime is 1666741854733. The reversal of 1666741854688 is 8864581476661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26042841448 + ... + 26042841511.

It is an arithmetic number, because the mean of its divisors is an integer number (273449835540).

Almost surely, 2^{1666741854688} is an apocalyptic number.

It is an amenable number.

1666741854688 is a deficient number, since it is larger than the sum of its proper divisors (1614656171792).

1666741854688 is an equidigital number, since it uses as much as digits as its factorization.

1666741854688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52085682969 (or 52085682961 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 70.

The spelling of 1666741854688 in words is "one trillion, six hundred sixty-six billion, seven hundred forty-one million, eight hundred fifty-four thousand, six hundred eighty-eight".