663873085441 has 16 divisors (see below), whose sum is σ = 672725874240. Its totient is φ = 655075008000.

The previous prime is 663873085397. The next prime is 663873085481. The reversal of 663873085441 is 144580378366.

It is a cyclic number.

It is not a de Polignac number, because 663873085441 - 2¹³ = 663873077249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663873085481) 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, 85624021 + ... + 85631773.

It is an arithmetic number, because the mean of its divisors is an integer number (42045367140).

Almost surely, 2^663873085441 is an apocalyptic number.

It is an amenable number.

663873085441 is a deficient number, since it is larger than the sum of its proper divisors (8852788799).

663873085441 is a wasteful number, since it uses less digits than its factorization.

663873085441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 663873085441 in words is "six hundred sixty-three billion, eight hundred seventy-three million, eighty-five thousand, four hundred forty-one".