663988050 has 192 divisors, whose sum is σ = 2031477120. Its totient is φ = 158112000.

The previous prime is 663988037. The next prime is 663988097. The reversal of 663988050 is 50889366.

663988050 is a `hidden beast` number, since 6 + 639 + 8 + 8 + 0 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 663987987 and 663988005.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 905484 + ... + 906216.

It is an arithmetic number, because the mean of its divisors is an integer number (10580610).

Almost surely, 2^663988050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663988050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015738560).

663988050 is an abundant number, since it is smaller than the sum of its proper divisors (1367489070).

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

663988050 is a wasteful number, since it uses less digits than its factorization.

663988050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 815 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 663988050 is about 25767.9655774374. The cubic root of 663988050 is about 872.4089006507.

The spelling of 663988050 in words is "six hundred sixty-three million, nine hundred eighty-eight thousand, fifty".