663632550 has 144 divisors (see below), whose sum is σ = 2046556512. Its totient is φ = 151027200.

The previous prime is 663632539. The next prime is 663632597. The reversal of 663632550 is 55236366.

It is a super-2 number, since 2×663632550² = 880816322839005000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1439320 + ... + 1439780.

It is an arithmetic number, because the mean of its divisors is an integer number (14212198).

Almost surely, 2^663632550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663632550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1023278256).

663632550 is an abundant number, since it is smaller than the sum of its proper divisors (1382923962).

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

663632550 is a wasteful number, since it uses less digits than its factorization.

663632550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The square root of 663632550 is about 25761.0665540074. The cubic root of 663632550 is about 872.2531765978.

The spelling of 663632550 in words is "six hundred sixty-three million, six hundred thirty-two thousand, five hundred fifty".