1663456 has 24 divisors (see below), whose sum is σ = 3303720. Its totient is φ = 824448.

The previous prime is 1663397. The next prime is 1663457. The reversal of 1663456 is 6543661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150 + ... + 7378.

It is an arithmetic number, because the mean of its divisors is an integer number (137655).

2^1663456 is an apocalyptic number.

1663456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1663456 is a deficient number, since it is larger than the sum of its proper divisors (1640264).

1663456 is a wasteful number, since it uses less digits than its factorization.

1663456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 458 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1663456 is about 1289.7503634425. The cubic root of 1663456 is about 118.4869278844.

The spelling of 1663456 in words is "one million, six hundred sixty-three thousand, four hundred fifty-six".