68669 has 2 divisors, whose sum is σ = 68670. Its totient is φ = 68668.

The previous prime is 68659. The next prime is 68683. The reversal of 68669 is 96686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 25 = 262^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68669 is a prime.

It is a super-2 number, since 2×68669² = 9430863122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6² + 8³ + 6⁴ + 6⁵ + 9⁵ .

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34334 + 34335.

It is an arithmetic number, because the mean of its divisors is an integer number (34335).

2⁶⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

68669 is a deficient number, since it is larger than the sum of its proper divisors (1).

68669 is an equidigital number, since it uses as much as digits as its factorization.

68669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 68669 is about 262.0477055805. The cubic root of 68669 is about 40.9499687171.

It can be divided in two parts, 68 and 669, that added together give a palindrome (737).

The spelling of 68669 in words is "sixty-eight thousand, six hundred sixty-nine".