1663522 has 16 divisors (see below), whose sum is σ = 2944512. Its totient is φ = 689760.

The previous prime is 1663517. The next prime is 1663523. The reversal of 1663522 is 2253661.

It is not an unprimeable number, because it can be changed into a prime (1663523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1483 + ... + 2350.

It is an arithmetic number, because the mean of its divisors is an integer number (184032).

2^1663522 is an apocalyptic number.

1663522 is a deficient number, since it is larger than the sum of its proper divisors (1280990).

1663522 is a wasteful number, since it uses less digits than its factorization.

1663522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873.

The product of its digits is 2160, while the sum is 25.

The square root of 1663522 is about 1289.7759495354. The cubic root of 1663522 is about 118.4884949099.

The spelling of 1663522 in words is "one million, six hundred sixty-three thousand, five hundred twenty-two".