660244241 has 2 divisors, whose sum is σ = 660244242. Its totient is φ = 660244240.

The previous prime is 660244229. The next prime is 660244261. The reversal of 660244241 is 142442066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598291600 + 61952641 = 24460^2 + 7871^2 .

It is a cyclic number.

It is not a de Polignac number, because 660244241 - 2²⁶ = 593135377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (660244261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330122120 + 330122121.

It is an arithmetic number, because the mean of its divisors is an integer number (330122121).

Almost surely, 2^660244241 is an apocalyptic number.

It is an amenable number.

660244241 is a deficient number, since it is larger than the sum of its proper divisors (1).

660244241 is an equidigital number, since it uses as much as digits as its factorization.

660244241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 660244241 is about 25695.2182516514. The cubic root of 660244241 is about 870.7661551489.

The spelling of 660244241 in words is "six hundred sixty million, two hundred forty-four thousand, two hundred forty-one".