660534293 has 2 divisors, whose sum is σ = 660534294. Its totient is φ = 660534292.

The previous prime is 660534253. The next prime is 660534299. The reversal of 660534293 is 392435066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336282244 + 324252049 = 18338^2 + 18007^2 .

It is a cyclic number.

It is not a de Polignac number, because 660534293 - 2²² = 656339989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660534299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330267146 + 330267147.

It is an arithmetic number, because the mean of its divisors is an integer number (330267147).

Almost surely, 2^660534293 is an apocalyptic number.

It is an amenable number.

660534293 is a deficient number, since it is larger than the sum of its proper divisors (1).

660534293 is an equidigital number, since it uses as much as digits as its factorization.

660534293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 660534293 is about 25700.8617170709. The cubic root of 660534293 is about 870.8936486193.

The spelling of 660534293 in words is "six hundred sixty million, five hundred thirty-four thousand, two hundred ninety-three".