660343241 has 2 divisors, whose sum is σ = 660343242. Its totient is φ = 660343240.

The previous prime is 660343219. The next prime is 660343247. The reversal of 660343241 is 142343066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610287616 + 50055625 = 24704^2 + 7075^2 .

It is a cyclic number.

It is not a de Polignac number, because 660343241 - 2¹⁰ = 660342217 is a prime.

It is not a weakly prime, because it can be changed into another prime (660343247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330171620 + 330171621.

It is an arithmetic number, because the mean of its divisors is an integer number (330171621).

Almost surely, 2^660343241 is an apocalyptic number.

It is an amenable number.

660343241 is a deficient number, since it is larger than the sum of its proper divisors (1).

660343241 is an equidigital number, since it uses as much as digits as its factorization.

660343241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 660343241 is about 25697.1446079132. The cubic root of 660343241 is about 870.8096751756.

The spelling of 660343241 in words is "six hundred sixty million, three hundred forty-three thousand, two hundred forty-one".