660541493 has 2 divisors, whose sum is σ = 660541494. Its totient is φ = 660541492.

The previous prime is 660541487. The next prime is 660541499. The reversal of 660541493 is 394145066.

660541493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (660541487) and next prime (660541499).

It can be written as a sum of positive squares in only one way, i.e., 587917009 + 72624484 = 24247^2 + 8522^2 .

It is a cyclic number.

It is not a de Polignac number, because 660541493 - 2⁶ = 660541429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660541499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330270746 + 330270747.

It is an arithmetic number, because the mean of its divisors is an integer number (330270747).

Almost surely, 2^660541493 is an apocalyptic number.

It is an amenable number.

660541493 is a deficient number, since it is larger than the sum of its proper divisors (1).

660541493 is an equidigital number, since it uses as much as digits as its factorization.

660541493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 660541493 is about 25701.0017898136. The cubic root of 660541493 is about 870.8968129322.

The spelling of 660541493 in words is "six hundred sixty million, five hundred forty-one thousand, four hundred ninety-three".