660248593 has 2 divisors, whose sum is σ = 660248594. Its totient is φ = 660248592.

The previous prime is 660248591. The next prime is 660248599. The reversal of 660248593 is 395842066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613899729 + 46348864 = 24777^2 + 6808^2 .

It is a cyclic number.

It is not a de Polignac number, because 660248593 - 2¹ = 660248591 is a prime.

Together with 660248591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (660248591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330124296 + 330124297.

It is an arithmetic number, because the mean of its divisors is an integer number (330124297).

Almost surely, 2^660248593 is an apocalyptic number.

It is an amenable number.

660248593 is a deficient number, since it is larger than the sum of its proper divisors (1).

660248593 is an equidigital number, since it uses as much as digits as its factorization.

660248593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 660248593 is about 25695.3029365291. The cubic root of 660248593 is about 870.7680683631.

The spelling of 660248593 in words is "six hundred sixty million, two hundred forty-eight thousand, five hundred ninety-three".