1668133 has 2 divisors, whose sum is σ = 1668134. Its totient is φ = 1668132.

The previous prime is 1668131. The next prime is 1668137. The reversal of 1668133 is 3318661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 338724 = 1153^2 + 582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668133 - 2¹ = 1668131 is a prime.

Together with 1668131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834066 + 834067.

It is an arithmetic number, because the mean of its divisors is an integer number (834067).

2^1668133 is an apocalyptic number.

It is an amenable number.

1668133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668133 is an equidigital number, since it uses as much as digits as its factorization.

1668133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 1668133 is about 1291.5622323373. The cubic root of 1668133 is about 118.5978705657.

The spelling of 1668133 in words is "one million, six hundred sixty-eight thousand, one hundred thirty-three".