663306620 has 12 divisors (see below), whose sum is σ = 1392943944. Its totient is φ = 265322640.

The previous prime is 663306617. The next prime is 663306641. The reversal of 663306620 is 26603366.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16582646 + ... + 16582685.

It is an arithmetic number, because the mean of its divisors is an integer number (116078662).

Almost surely, 2^663306620 is an apocalyptic number.

It is an amenable number.

663306620 is an abundant number, since it is smaller than the sum of its proper divisors (729637324).

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

663306620 is a wasteful number, since it uses less digits than its factorization.

663306620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33165340 (or 33165338 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 663306620 is about 25754.7397579552. The cubic root of 663306620 is about 872.1103565828.

Adding to 663306620 its reverse (26603366), we get a palindrome (689909986).

The spelling of 663306620 in words is "six hundred sixty-three million, three hundred six thousand, six hundred twenty".