663617712 has 160 divisors (see below), whose sum is σ = 1994872320. Its totient is φ = 188559360.

The previous prime is 663617711. The next prime is 663617723. The reversal of 663617712 is 217716366.

It is a super-2 number, since 2×663617712² = 880776935360229888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663617711) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 355662 + ... + 357522.

It is an arithmetic number, because the mean of its divisors is an integer number (12467952).

Almost surely, 2^663617712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663617712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997436160).

663617712 is an abundant number, since it is smaller than the sum of its proper divisors (1331254608).

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

663617712 is a wasteful number, since it uses less digits than its factorization.

663617712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931 (or 1925 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 663617712 is about 25760.7785596631. The cubic root of 663617712 is about 872.2466757166.

The spelling of 663617712 in words is "six hundred sixty-three million, six hundred seventeen thousand, seven hundred twelve".