663945854 has 32 divisors (see below), whose sum is σ = 1171588320. Its totient is φ = 278208000.

The previous prime is 663945847. The next prime is 663945857. The reversal of 663945854 is 458549366.

663945854 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663945857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367754 + ... + 369554.

It is an arithmetic number, because the mean of its divisors is an integer number (36612135).

Almost surely, 2^663945854 is an apocalyptic number.

663945854 is a deficient number, since it is larger than the sum of its proper divisors (507642466).

663945854 is a wasteful number, since it uses less digits than its factorization.

663945854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116.

The product of its digits is 3110400, while the sum is 50.

The square root of 663945854 is about 25767.1467958717. The cubic root of 663945854 is about 872.3904199236.

The spelling of 663945854 in words is "six hundred sixty-three million, nine hundred forty-five thousand, eight hundred fifty-four".