661327241 has 2 divisors, whose sum is σ = 661327242. Its totient is φ = 661327240.

The previous prime is 661327237. The next prime is 661327267. The reversal of 661327241 is 142723166.

661327241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552438016 + 108889225 = 23504^2 + 10435^2 .

It is a cyclic number.

It is not a de Polignac number, because 661327241 - 2² = 661327237 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 661327198 and 661327207.

It is not a weakly prime, because it can be changed into another prime (661327201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330663620 + 330663621.

It is an arithmetic number, because the mean of its divisors is an integer number (330663621).

Almost surely, 2^661327241 is an apocalyptic number.

It is an amenable number.

661327241 is a deficient number, since it is larger than the sum of its proper divisors (1).

661327241 is an equidigital number, since it uses as much as digits as its factorization.

661327241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 661327241 is about 25716.2835767535. The cubic root of 661327241 is about 871.2420015774.

The spelling of 661327241 in words is "six hundred sixty-one million, three hundred twenty-seven thousand, two hundred forty-one".