663964842 has 32 divisors (see below), whose sum is σ = 1399072320. Its totient is φ = 209485440.

The previous prime is 663964799. The next prime is 663964877. The reversal of 663964842 is 248469366.

663964842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×663964842² = 881698622824169928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663964791 and 663964800.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182998 + ... + 186590.

It is an arithmetic number, because the mean of its divisors is an integer number (43721010).

Almost surely, 2^663964842 is an apocalyptic number.

663964842 is an abundant number, since it is smaller than the sum of its proper divisors (735107478).

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

663964842 is a wasteful number, since it uses less digits than its factorization.

663964842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238.

The product of its digits is 1492992, while the sum is 48.

The square root of 663964842 is about 25767.5152469151. The cubic root of 663964842 is about 872.3987362601.

The spelling of 663964842 in words is "six hundred sixty-three million, nine hundred sixty-four thousand, eight hundred forty-two".