663612 has 24 divisors (see below), whose sum is σ = 1640016. Its totient is φ = 208128.

The previous prime is 663601. The next prime is 663631. The reversal of 663612 is 216366.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663612.

It is an unprimeable number.

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, 1423 + ... + 1830.

It is an arithmetic number, because the mean of its divisors is an integer number (68334).

2⁶⁶³⁶¹² is an apocalyptic number.

It is an amenable number.

663612 is an abundant number, since it is smaller than the sum of its proper divisors (976404).

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

663612 is a wasteful number, since it uses less digits than its factorization.

663612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277 (or 3275 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 663612 is about 814.6238395726. The cubic root of 663612 is about 87.2244173128.

Adding to 663612 its reverse (216366), we get a palindrome (879978).

It can be divided in two parts, 663 and 612, that added together give a triangular number (1275 = T₅₀).

The spelling of 663612 in words is "six hundred sixty-three thousand, six hundred twelve".