668053523 has 2 divisors, whose sum is σ = 668053524. Its totient is φ = 668053522.

The previous prime is 668053501. The next prime is 668053543. The reversal of 668053523 is 325350866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668053523 - 2¹⁰ = 668052499 is a prime.

It is not a weakly prime, because it can be changed into another prime (668053543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334026761 + 334026762.

It is an arithmetic number, because the mean of its divisors is an integer number (334026762).

Almost surely, 2^668053523 is an apocalyptic number.

668053523 is a deficient number, since it is larger than the sum of its proper divisors (1).

668053523 is an equidigital number, since it uses as much as digits as its factorization.

668053523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 668053523 is about 25846.7313794220. The cubic root of 668053523 is about 874.1858104665.

The spelling of 668053523 in words is "six hundred sixty-eight million, fifty-three thousand, five hundred twenty-three".