663934121211 has 8 divisors (see below), whose sum is σ = 885271389520. Its totient is φ = 442609800192.

The previous prime is 663934121203. The next prime is 663934121237. The reversal of 663934121211 is 112121439366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663934121211 - 2³ = 663934121203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663934121211.

It is not an unprimeable number, because it can be changed into a prime (663934128211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3116530 + ... + 3322743.

It is an arithmetic number, because the mean of its divisors is an integer number (110658923690).

Almost surely, 2^663934121211 is an apocalyptic number.

663934121211 is a deficient number, since it is larger than the sum of its proper divisors (221337268309).

663934121211 is a wasteful number, since it uses less digits than its factorization.

663934121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473645.

The product of its digits is 46656, while the sum is 39.

The spelling of 663934121211 in words is "six hundred sixty-three billion, nine hundred thirty-four million, one hundred twenty-one thousand, two hundred eleven".