668141 has 2 divisors, whose sum is σ = 668142. Its totient is φ = 668140.

The previous prime is 668111. The next prime is 668153. The reversal of 668141 is 141866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469225 + 198916 = 685^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 668141 - 2¹⁸ = 405997 is a prime.

It is equal to p₅₄₁₇₉ and since 668141 and 54179 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668141.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668141.

It is not a weakly prime, because it can be changed into another prime (668111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334070 + 334071.

It is an arithmetic number, because the mean of its divisors is an integer number (334071).

2⁶⁶⁸¹⁴¹ is an apocalyptic number.

It is an amenable number.

668141 is a deficient number, since it is larger than the sum of its proper divisors (1).

668141 is an equidigital number, since it uses as much as digits as its factorization.

668141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 668141 is about 817.3989234150. The cubic root of 668141 is about 87.4223965001.

The spelling of 668141 in words is "six hundred sixty-eight thousand, one hundred forty-one".