1664033 has 8 divisors (see below), whose sum is σ = 1923840. Its totient is φ = 1409760.

The previous prime is 1664021. The next prime is 1664053. The reversal of 1664033 is 3304661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1664033 - 2⁴ = 1664017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713 + ... + 1958.

It is an arithmetic number, because the mean of its divisors is an integer number (240480).

2^1664033 is an apocalyptic number.

It is an amenable number.

1664033 is a deficient number, since it is larger than the sum of its proper divisors (259807).

1664033 is an equidigital number, since it uses as much as digits as its factorization.

1664033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1664033 is about 1289.9740307464. The cubic root of 1664033 is about 118.5006260834.

Adding to 1664033 its reverse (3304661), we get a palindrome (4968694).

The spelling of 1664033 in words is "one million, six hundred sixty-four thousand, thirty-three".