226566661 has 2 divisors, whose sum is σ = 226566662. Its totient is φ = 226566660.

The previous prime is 226566653. The next prime is 226566689. The reversal of 226566661 is 166665622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173422561 + 53144100 = 13169^2 + 7290^2 .

It is a cyclic number.

It is not a de Polignac number, because 226566661 - 2³ = 226566653 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 (226560661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113283330 + 113283331.

It is an arithmetic number, because the mean of its divisors is an integer number (113283331).

Almost surely, 2^226566661 is an apocalyptic number.

It is an amenable number.

226566661 is a deficient number, since it is larger than the sum of its proper divisors (1).

226566661 is an equidigital number, since it uses as much as digits as its factorization.

226566661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 226566661 is about 15052.1314437524. The cubic root of 226566661 is about 609.6286021927.

The spelling of 226566661 in words is "two hundred twenty-six million, five hundred sixty-six thousand, six hundred sixty-one".