1663000 has 32 divisors (see below), whose sum is σ = 3893760. Its totient is φ = 664800.

The previous prime is 1662979. The next prime is 1663009. The reversal of 1663000 is 3661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (121680).

2^1663000 is an apocalyptic number.

1663000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946880).

1663000 is an abundant number, since it is smaller than the sum of its proper divisors (2230760).

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

1663000 is a wasteful number, since it uses less digits than its factorization.

1663000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1663000 is about 1289.5735729302. The cubic root of 1663000 is about 118.4761000302.

Adding to 1663000 its reverse (3661), we get a palindrome (1666661).

The spelling of 1663000 in words is "one million, six hundred sixty-three thousand".