668753573 has 2 divisors, whose sum is σ = 668753574. Its totient is φ = 668753572.

The previous prime is 668753537. The next prime is 668753611. The reversal of 668753573 is 375357866.

It is a happy number.

Together with previous prime (668753537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667602244 + 1151329 = 25838^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 668753573 - 2¹⁰ = 668752549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668756573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334376786 + 334376787.

It is an arithmetic number, because the mean of its divisors is an integer number (334376787).

Almost surely, 2^668753573 is an apocalyptic number.

It is an amenable number.

668753573 is a deficient number, since it is larger than the sum of its proper divisors (1).

668753573 is an equidigital number, since it uses as much as digits as its factorization.

668753573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 50.

The square root of 668753573 is about 25860.2701648687. The cubic root of 668753573 is about 874.4910555396.

The spelling of 668753573 in words is "six hundred sixty-eight million, seven hundred fifty-three thousand, five hundred seventy-three".