1663146 has 32 divisors (see below), whose sum is σ = 3892800. Its totient is φ = 524880.

The previous prime is 1663133. The next prime is 1663147. The reversal of 1663146 is 6413661.

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

It is not an unprimeable number, because it can be changed into a prime (1663147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (121650).

2^1663146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946400).

1663146 is an abundant number, since it is smaller than the sum of its proper divisors (2229654).

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

1663146 is a wasteful number, since it uses less digits than its factorization.

1663146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1645 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1663146 is about 1289.6301795476. The cubic root of 1663146 is about 118.4795670586.

The spelling of 1663146 in words is "one million, six hundred sixty-three thousand, one hundred forty-six".