16660229 has 2 divisors, whose sum is σ = 16660230. Its totient is φ = 16660228.

The previous prime is 16660219. The next prime is 16660247. The reversal of 16660229 is 92206661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14615329 + 2044900 = 3823^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 16660229 - 2¹⁶ = 16594693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16660195 and 16660204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16660219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330114 + 8330115.

It is an arithmetic number, because the mean of its divisors is an integer number (8330115).

Almost surely, 2^16660229 is an apocalyptic number.

It is an amenable number.

16660229 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660229 is an equidigital number, since it uses as much as digits as its factorization.

16660229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 16660229 is about 4081.6943785639. The cubic root of 16660229 is about 255.4035849312.

The spelling of 16660229 in words is "sixteen million, six hundred sixty thousand, two hundred twenty-nine".