663516 has 36 divisors (see below), whose sum is σ = 1917552. Its totient is φ = 189504.

The previous prime is 663463. The next prime is 663517. The reversal of 663516 is 615366.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 663516.

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 663516.

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

663516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065 + ... + 1568.

2⁶⁶³⁵¹⁶ is an apocalyptic number.

It is an amenable number.

663516 is an abundant number, since it is smaller than the sum of its proper divisors (1254036).

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

663516 is a wasteful number, since it uses less digits than its factorization.

663516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2645 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 663516 is about 814.5649145403. The cubic root of 663516 is about 87.2202110658.

The spelling of 663516 in words is "six hundred sixty-three thousand, five hundred sixteen".