663905950 has 24 divisors (see below), whose sum is σ = 1235970000. Its totient is φ = 265324800.

The previous prime is 663905941. The next prime is 663905953. The reversal of 663905950 is 59509366.

It is a happy number.

It is a super-2 number, since 2×663905950² = 881542220890805000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663905897 and 663905906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663905953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57135 + ... + 67765.

It is an arithmetic number, because the mean of its divisors is an integer number (51498750).

Almost surely, 2^663905950 is an apocalyptic number.

663905950 is a deficient number, since it is larger than the sum of its proper divisors (572064050).

663905950 is a wasteful number, since it uses less digits than its factorization.

663905950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11892 (or 11887 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 663905950 is about 25766.3724649008. The cubic root of 663905950 is about 872.3729423113.

The spelling of 663905950 in words is "six hundred sixty-three million, nine hundred five thousand, nine hundred fifty".