1664133 has 4 divisors (see below), whose sum is σ = 2218848. Its totient is φ = 1109420.

The previous prime is 1664123. The next prime is 1664227. The reversal of 1664133 is 3314661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1664133 - 2⁵ = 1664101 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277353 + ... + 277358.

It is an arithmetic number, because the mean of its divisors is an integer number (554712).

2^1664133 is an apocalyptic number.

It is an amenable number.

1664133 is a deficient number, since it is larger than the sum of its proper divisors (554715).

1664133 is an equidigital number, since it uses as much as digits as its factorization.

1664133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554714.

The product of its digits is 1296, while the sum is 24.

The square root of 1664133 is about 1290.0127906343. The cubic root of 1664133 is about 118.5029997994.

Adding to 1664133 its reverse (3314661), we get a palindrome (4978794).

The spelling of 1664133 in words is "one million, six hundred sixty-four thousand, one hundred thirty-three".