1664411 has 8 divisors (see below), whose sum is σ = 1943040. Its totient is φ = 1396008.

The previous prime is 1664407. The next prime is 1664417. The reversal of 1664411 is 1144661.

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

It is a cyclic number.

It is not a de Polignac number, because 1664411 - 2² = 1664407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664417) 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, 2201 + ... + 2858.

It is an arithmetic number, because the mean of its divisors is an integer number (242880).

2^1664411 is an apocalyptic number.

1664411 is a deficient number, since it is larger than the sum of its proper divisors (278629).

1664411 is an equidigital number, since it uses as much as digits as its factorization.

1664411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113.

The product of its digits is 576, while the sum is 23.

The square root of 1664411 is about 1290.1205370042. The cubic root of 1664411 is about 118.5095982303.

The spelling of 1664411 in words is "one million, six hundred sixty-four thousand, four hundred eleven".