100666229 has 2 divisors, whose sum is σ = 100666230. Its totient is φ = 100666228.

The previous prime is 100666219. The next prime is 100666243. The reversal of 100666229 is 922666001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85063729 + 15602500 = 9223^2 + 3950^2 .

It is a cyclic number.

It is not a de Polignac number, because 100666229 - 2⁸ = 100665973 is a prime.

It is a super-2 number, since 2×100666229² = 20267379322160882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 100666195 and 100666204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100666219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50333114 + 50333115.

It is an arithmetic number, because the mean of its divisors is an integer number (50333115).

Almost surely, 2^100666229 is an apocalyptic number.

It is an amenable number.

100666229 is a deficient number, since it is larger than the sum of its proper divisors (1).

100666229 is an equidigital number, since it uses as much as digits as its factorization.

100666229 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 100666229 is about 10033.2561514196. The cubic root of 100666229 is about 465.1873896915.

The spelling of 100666229 in words is "one hundred million, six hundred sixty-six thousand, two hundred twenty-nine".