1663411 has 8 divisors (see below), whose sum is σ = 1764000. Its totient is φ = 1565760.

The previous prime is 1663397. The next prime is 1663457. The reversal of 1663411 is 1143661.

It is a happy number.

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 1663411 - 2⁵ = 1663379 is a prime.

It is a Duffinian number.

1663411 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (220500).

2^1663411 is an apocalyptic number.

1663411 is a deficient number, since it is larger than the sum of its proper divisors (100589).

1663411 is a wasteful number, since it uses less digits than its factorization.

1663411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469.

The product of its digits is 432, while the sum is 22.

The square root of 1663411 is about 1289.7329180881. The cubic root of 1663411 is about 118.4858594342.

The spelling of 1663411 in words is "one million, six hundred sixty-three thousand, four hundred eleven".