1668011 has 2 divisors, whose sum is σ = 1668012. Its totient is φ = 1668010.

The previous prime is 1668001. The next prime is 1668019. The reversal of 1668011 is 1108661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668011 - 2⁶ = 1667947 is a prime.

It is a super-2 number, since 2×1668011² = 5564521392242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1668019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834005 + 834006.

It is an arithmetic number, because the mean of its divisors is an integer number (834006).

2^1668011 is an apocalyptic number.

1668011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668011 is an equidigital number, since it uses as much as digits as its factorization.

1668011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1668011 is about 1291.5150018486. The cubic root of 1668011 is about 118.5949792509.

The spelling of 1668011 in words is "one million, six hundred sixty-eight thousand, eleven".