220166447 has 2 divisors, whose sum is σ = 220166448. Its totient is φ = 220166446.

The previous prime is 220166431. The next prime is 220166459. The reversal of 220166447 is 744661022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220166447 - 2⁴ = 220166431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220166147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110083223 + 110083224.

It is an arithmetic number, because the mean of its divisors is an integer number (110083224).

Almost surely, 2^220166447 is an apocalyptic number.

220166447 is a deficient number, since it is larger than the sum of its proper divisors (1).

220166447 is an equidigital number, since it uses as much as digits as its factorization.

220166447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 220166447 is about 14838.0068405430. The cubic root of 220166447 is about 603.8332790946.

The spelling of 220166447 in words is "two hundred twenty million, one hundred sixty-six thousand, four hundred forty-seven".