1663118 has 4 divisors (see below), whose sum is σ = 2494680. Its totient is φ = 831558.

The previous prime is 1663117. The next prime is 1663133. The reversal of 1663118 is 8113661.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1663118² = 5531922963848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415778 + ... + 415781.

It is an arithmetic number, because the mean of its divisors is an integer number (623670).

2^1663118 is an apocalyptic number.

1663118 is a deficient number, since it is larger than the sum of its proper divisors (831562).

1663118 is an equidigital number, since it uses as much as digits as its factorization.

1663118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831561.

The product of its digits is 864, while the sum is 26.

The square root of 1663118 is about 1289.6193236766. The cubic root of 1663118 is about 118.4789021648.

Adding to 1663118 its reverse (8113661), we get a palindrome (9776779).

The spelling of 1663118 in words is "one million, six hundred sixty-three thousand, one hundred eighteen".