663284638811 has 8 divisors (see below), whose sum is σ = 692276232960. Its totient is φ = 634305805672.

The previous prime is 663284638771. The next prime is 663284638937. The reversal of 663284638811 is 118836482366.

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

It is a cyclic number.

It is not a de Polignac number, because 663284638811 - 2¹⁰ = 663284637787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663284658811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083951 + ... + 3292008.

It is an arithmetic number, because the mean of its divisors is an integer number (86534529120).

Almost surely, 2^663284638811 is an apocalyptic number.

663284638811 is a deficient number, since it is larger than the sum of its proper divisors (28991594149).

663284638811 is a wasteful number, since it uses less digits than its factorization.

663284638811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380505.

The product of its digits is 7962624, while the sum is 56.

The spelling of 663284638811 in words is "six hundred sixty-three billion, two hundred eighty-four million, six hundred thirty-eight thousand, eight hundred eleven".