668029 has 2 divisors, whose sum is σ = 668030. Its totient is φ = 668028.

The previous prime is 668009. The next prime is 668033. The reversal of 668029 is 920866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 252004 = 645^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 668029 - 2¹¹ = 665981 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668009) 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, 334014 + 334015.

It is an arithmetic number, because the mean of its divisors is an integer number (334015).

2⁶⁶⁸⁰²⁹ is an apocalyptic number.

It is an amenable number.

668029 is a deficient number, since it is larger than the sum of its proper divisors (1).

668029 is an equidigital number, since it uses as much as digits as its factorization.

668029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 668029 is about 817.3304105440. The cubic root of 668029 is about 87.4175113758.

The spelling of 668029 in words is "six hundred sixty-eight thousand, twenty-nine".