229606661 has 2 divisors, whose sum is σ = 229606662. Its totient is φ = 229606660.

The previous prime is 229606651. The next prime is 229606667. The reversal of 229606661 is 166606922.

229606661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169156036 + 60450625 = 13006^2 + 7775^2 .

It is a cyclic number.

It is not a de Polignac number, because 229606661 - 2²² = 225412357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229606667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114803330 + 114803331.

It is an arithmetic number, because the mean of its divisors is an integer number (114803331).

Almost surely, 2^229606661 is an apocalyptic number.

It is an amenable number.

229606661 is a deficient number, since it is larger than the sum of its proper divisors (1).

229606661 is an equidigital number, since it uses as much as digits as its factorization.

229606661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 229606661 is about 15152.7773361849. Note that the first 3 decimals coincide. The cubic root of 229606661 is about 612.3430988362.

The spelling of 229606661 in words is "two hundred twenty-nine million, six hundred six thousand, six hundred sixty-one".