6666229 has 2 divisors, whose sum is σ = 6666230. Its totient is φ = 6666228.

The previous prime is 6666223. The next prime is 6666239. The reversal of 6666229 is 9226666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3783025 + 2883204 = 1945^2 + 1698^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666229 - 2¹⁵ = 6633461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333114 + 3333115.

It is an arithmetic number, because the mean of its divisors is an integer number (3333115).

Almost surely, 2^6666229 is an apocalyptic number.

It is an amenable number.

6666229 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666229 is an equidigital number, since it uses as much as digits as its factorization.

6666229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 6666229 is about 2581.9041422950. The cubic root of 6666229 is about 188.2030870851.

The spelling of 6666229 in words is "six million, six hundred sixty-six thousand, two hundred twenty-nine".