668228229 has 6 divisors (see below), whose sum is σ = 965218566. Its totient is φ = 445485480.

The previous prime is 668228191. The next prime is 668228257. The reversal of 668228229 is 922822866.

668228229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 640191204 + 28037025 = 25302^2 + 5295^2 .

It is not a de Polignac number, because 668228229 - 2¹⁹ = 667703941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668228329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37123782 + ... + 37123799.

It is an arithmetic number, because the mean of its divisors is an integer number (160869761).

Almost surely, 2^668228229 is an apocalyptic number.

It is an amenable number.

668228229 is a deficient number, since it is larger than the sum of its proper divisors (296990337).

668228229 is a wasteful number, since it uses less digits than its factorization.

668228229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74247587 (or 74247584 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 668228229 is about 25850.1108121416. The cubic root of 668228229 is about 874.2620080512.

The spelling of 668228229 in words is "six hundred sixty-eight million, two hundred twenty-eight thousand, two hundred twenty-nine".