1566650551166 has 4 divisors (see below), whose sum is σ = 2349975826752. Its totient is φ = 783325275582.

The previous prime is 1566650551159. The next prime is 1566650551187. The reversal of 1566650551166 is 6611550566651.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391662637790 + ... + 391662637793.

It is an arithmetic number, because the mean of its divisors is an integer number (587493956688).

Almost surely, 2^{1566650551166} is an apocalyptic number.

1566650551166 is a deficient number, since it is larger than the sum of its proper divisors (783325275586).

1566650551166 is an equidigital number, since it uses as much as digits as its factorization.

1566650551166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783325275585.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 1566650551166 in words is "one trillion, five hundred sixty-six billion, six hundred fifty million, five hundred fifty-one thousand, one hundred sixty-six".