220166887 has 2 divisors, whose sum is σ = 220166888. Its totient is φ = 220166886.

The previous prime is 220166857. The next prime is 220166899. The reversal of 220166887 is 788661022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220166887 - 2¹⁵ = 220134119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220166857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110083443 + 110083444.

It is an arithmetic number, because the mean of its divisors is an integer number (110083444).

Almost surely, 2^220166887 is an apocalyptic number.

220166887 is a deficient number, since it is larger than the sum of its proper divisors (1).

220166887 is an equidigital number, since it uses as much as digits as its factorization.

220166887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 220166887 is about 14838.0216673248. The cubic root of 220166887 is about 603.8336813455.

The spelling of 220166887 in words is "two hundred twenty million, one hundred sixty-six thousand, eight hundred eighty-seven".