556661166 has 8 divisors (see below), whose sum is σ = 1113322344. Its totient is φ = 185553720.

The previous prime is 556661159. The next prime is 556661167. The reversal of 556661166 is 661166655.

It is a sphenic number, since it is the product of 3 distinct primes.

556661166 is an admirable number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556661167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46388425 + ... + 46388436.

It is an arithmetic number, because the mean of its divisors is an integer number (139165293).

Almost surely, 2^556661166 is an apocalyptic number.

556661166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

556661166 is a wasteful number, since it uses less digits than its factorization.

556661166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92776866.

The product of its digits is 194400, while the sum is 42.

The square root of 556661166 is about 23593.6679217115. The cubic root of 556661166 is about 822.6156640523.

The spelling of 556661166 in words is "five hundred fifty-six million, six hundred sixty-one thousand, one hundred sixty-six".