663873085439 has 16 divisors (see below), whose sum is σ = 741727834560. Its totient is φ = 590940303360.

The previous prime is 663873085397. The next prime is 663873085481. The reversal of 663873085439 is 934580378366.

It is an interprime number because it is at equal distance from previous prime (663873085397) and next prime (663873085481).

It is a cyclic number.

It is not a de Polignac number, because 663873085439 - 2¹⁶ = 663873019903 is a prime.

It is a super-3 number, since 3×663873085439³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663873685439) 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, 9503882 + ... + 9573479.

It is an arithmetic number, because the mean of its divisors is an integer number (46357989660).

Almost surely, 2^663873085439 is an apocalyptic number.

663873085439 is a deficient number, since it is larger than the sum of its proper divisors (77854749121).

663873085439 is a wasteful number, since it uses less digits than its factorization.

663873085439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19077490.

The product of its (nonzero) digits is 78382080, while the sum is 62.

The spelling of 663873085439 in words is "six hundred sixty-three billion, eight hundred seventy-three million, eighty-five thousand, four hundred thirty-nine".