663635042 has 32 divisors (see below), whose sum is σ = 1176305664. Its totient is φ = 274784400.

The previous prime is 663635033. The next prime is 663635047. The reversal of 663635042 is 240536366.

It is a super-2 number, since 2×663635042² = 880822937940683528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663634993 and 663635011.

It is not an unprimeable number, because it can be changed into a prime (663635047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429323 + ... + 430865.

It is an arithmetic number, because the mean of its divisors is an integer number (36759552).

Almost surely, 2^663635042 is an apocalyptic number.

663635042 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

663635042 is a deficient number, since it is larger than the sum of its proper divisors (512670622).

663635042 is a wasteful number, since it uses less digits than its factorization.

663635042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 663635042 is about 25761.1149215247. The cubic root of 663635042 is about 872.2542683928.

The spelling of 663635042 in words is "six hundred sixty-three million, six hundred thirty-five thousand, forty-two".