663645435 has 16 divisors (see below), whose sum is σ = 1066475040. Its totient is φ = 352396800.

The previous prime is 663645419. The next prime is 663645457. The reversal of 663645435 is 534546366.

It is a happy number.

663645435 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663645435 - 2⁴ = 663645419 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93166 + ... + 100035.

It is an arithmetic number, because the mean of its divisors is an integer number (66654690).

Almost surely, 2^663645435 is an apocalyptic number.

663645435 is a deficient number, since it is larger than the sum of its proper divisors (402829605).

663645435 is a wasteful number, since it uses less digits than its factorization.

663645435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193438.

The product of its digits is 777600, while the sum is 42.

The square root of 663645435 is about 25761.3166394888. The cubic root of 663645435 is about 872.2588217446.

The spelling of 663645435 in words is "six hundred sixty-three million, six hundred forty-five thousand, four hundred thirty-five".