16662229 has 2 divisors, whose sum is σ = 16662230. Its totient is φ = 16662228.

The previous prime is 16662203. The next prime is 16662241. The reversal of 16662229 is 92226661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16589329 + 72900 = 4073^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 16662229 - 2⁵ = 16662197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16662194 and 16662203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16660229) 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 as a sum of consecutive naturals, namely, 8331114 + 8331115.

It is an arithmetic number, because the mean of its divisors is an integer number (8331115).

Almost surely, 2^16662229 is an apocalyptic number.

It is an amenable number.

16662229 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662229 is an equidigital number, since it uses as much as digits as its factorization.

16662229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 16662229 is about 4081.9393675066. The cubic root of 16662229 is about 255.4138046133.

The spelling of 16662229 in words is "sixteen million, six hundred sixty-two thousand, two hundred twenty-nine".