663867139 has 16 divisors (see below), whose sum is σ = 741049344. Its totient is φ = 590580000.

The previous prime is 663867137. The next prime is 663867143. The reversal of 663867139 is 931768366.

663867139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 663867139 - 2¹ = 663867137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663867092 and 663867101.

It is not an unprimeable number, because it can be changed into a prime (663867133) 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, 97872 + ... + 104434.

It is an arithmetic number, because the mean of its divisors is an integer number (46315584).

Almost surely, 2^663867139 is an apocalyptic number.

663867139 is a deficient number, since it is larger than the sum of its proper divisors (77182205).

663867139 is a wasteful number, since it uses less digits than its factorization.

663867139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6858.

The product of its digits is 979776, while the sum is 49.

The square root of 663867139 is about 25765.6193211031. The cubic root of 663867139 is about 872.3559427518.

The spelling of 663867139 in words is "six hundred sixty-three million, eight hundred sixty-seven thousand, one hundred thirty-nine".