663512 has 8 divisors (see below), whose sum is σ = 1244100. Its totient is φ = 331752.

The previous prime is 663463. The next prime is 663517. The reversal of 663512 is 215366.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663517) by changing a digit.

663512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41462 + ... + 41477.

2⁶⁶³⁵¹² is an apocalyptic number.

It is an amenable number.

663512 is a deficient number, since it is larger than the sum of its proper divisors (580588).

663512 is a wasteful number, since it uses less digits than its factorization.

663512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82945 (or 82941 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 663512 is about 814.5624592381. The cubic root of 663512 is about 87.2200357967.

Adding to 663512 its reverse (215366), we get a palindrome (878878).

The spelling of 663512 in words is "six hundred sixty-three thousand, five hundred twelve".