1664118 has 16 divisors (see below), whose sum is σ = 3698160. Its totient is φ = 554688.

The previous prime is 1664101. The next prime is 1664123. The reversal of 1664118 is 8114661.

1664118 is a `hidden beast` number, since 1 + 6 + 641 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1664091 and 1664100.

It is a congruent number.

It is an unprimeable number.

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, 15355 + ... + 15462.

It is an arithmetic number, because the mean of its divisors is an integer number (231135).

2^1664118 is an apocalyptic number.

1664118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1664118 is an abundant number, since it is smaller than the sum of its proper divisors (2034042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1664118 is a wasteful number, since it uses less digits than its factorization.

1664118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30828 (or 30822 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1664118 is about 1290.0069767253. The cubic root of 1664118 is about 118.5026437481.

Adding to 1664118 its reverse (8114661), we get a palindrome (9778779).

The spelling of 1664118 in words is "one million, six hundred sixty-four thousand, one hundred eighteen".