660534253 has 2 divisors, whose sum is σ = 660534254. Its totient is φ = 660534252.

The previous prime is 660534233. The next prime is 660534293. The reversal of 660534253 is 352435066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659616489 + 917764 = 25683^2 + 958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660534253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660534233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330267126 + 330267127.

It is an arithmetic number, because the mean of its divisors is an integer number (330267127).

Almost surely, 2^660534253 is an apocalyptic number.

It is an amenable number.

660534253 is a deficient number, since it is larger than the sum of its proper divisors (1).

660534253 is an equidigital number, since it uses as much as digits as its factorization.

660534253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 660534253 is about 25700.8609388869. The cubic root of 660534253 is about 870.8936310397.

The spelling of 660534253 in words is "six hundred sixty million, five hundred thirty-four thousand, two hundred fifty-three".