669412241 has 2 divisors, whose sum is σ = 669412242. Its totient is φ = 669412240.

The previous prime is 669412169. The next prime is 669412243. The reversal of 669412241 is 142214966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631466641 + 37945600 = 25129^2 + 6160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669412241 is a prime.

It is a super-2 number, since 2×669412241² = 896225496801284162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 669412243, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (669412243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334706120 + 334706121.

It is an arithmetic number, because the mean of its divisors is an integer number (334706121).

Almost surely, 2^669412241 is an apocalyptic number.

It is an amenable number.

669412241 is a deficient number, since it is larger than the sum of its proper divisors (1).

669412241 is an equidigital number, since it uses as much as digits as its factorization.

669412241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 669412241 is about 25873.0021644184. The cubic root of 669412241 is about 874.7780622424.

The spelling of 669412241 in words is "six hundred sixty-nine million, four hundred twelve thousand, two hundred forty-one".