1663814 has 8 divisors (see below), whose sum is σ = 2531088. Its totient is φ = 820120.

The previous prime is 1663813. The next prime is 1663861. The reversal of 1663814 is 4183661.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663813) 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, 5717 + ... + 6000.

It is an arithmetic number, because the mean of its divisors is an integer number (316386).

2^1663814 is an apocalyptic number.

1663814 is a deficient number, since it is larger than the sum of its proper divisors (867274).

1663814 is a wasteful number, since it uses less digits than its factorization.

1663814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11790.

The product of its digits is 3456, while the sum is 29.

The square root of 1663814 is about 1289.8891425235. The cubic root of 1663814 is about 118.4954273132.

The spelling of 1663814 in words is "one million, six hundred sixty-three thousand, eight hundred fourteen".