660067 has 2 divisors, whose sum is σ = 660068. Its totient is φ = 660066.

The previous prime is 660061. The next prime is 660071. The reversal of 660067 is 760066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660067 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660067.

It is not a weakly prime, because it can be changed into another prime (660061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330033 + 330034.

It is an arithmetic number, because the mean of its divisors is an integer number (330034).

2⁶⁶⁰⁰⁶⁷ is an apocalyptic number.

660067 is a deficient number, since it is larger than the sum of its proper divisors (1).

660067 is an equidigital number, since it uses as much as digits as its factorization.

660067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 660067 is about 812.4450750666. The cubic root of 660067 is about 87.0688229806.

Subtracting 660067 from its reverse (760066), we obtain a palindrome (99999).

The spelling of 660067 in words is "six hundred sixty thousand, sixty-seven".