663450342550 has 48 divisors (see below), whose sum is σ = 1238509569600. Its totient is φ = 264415737600.

The previous prime is 663450342521. The next prime is 663450342589. The reversal of 663450342550 is 55243054366.

663450342550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 663450342497 and 663450342506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17009971 + ... + 17048929.

It is an arithmetic number, because the mean of its divisors is an integer number (25802282700).

Almost surely, 2^663450342550 is an apocalyptic number.

663450342550 is a deficient number, since it is larger than the sum of its proper divisors (575059227050).

663450342550 is a wasteful number, since it uses less digits than its factorization.

663450342550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40201 (or 40196 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 43.

The spelling of 663450342550 in words is "six hundred sixty-three billion, four hundred fifty million, three hundred forty-two thousand, five hundred fifty".