663441132321 has 12 divisors (see below), whose sum is σ = 1045422390480. Its totient is φ = 402085534680.

The previous prime is 663441132317. The next prime is 663441132359. The reversal of 663441132321 is 123231144366.

663441132321 is a `hidden beast` number, since 6 + 6 + 3 + 4 + 411 + 3 + 232 + 1 = 666.

It is not a de Polignac number, because 663441132321 - 2² = 663441132317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663441132121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3350712691 + ... + 3350712888.

It is an arithmetic number, because the mean of its divisors is an integer number (87118532540).

Almost surely, 2^663441132321 is an apocalyptic number.

It is an amenable number.

663441132321 is a deficient number, since it is larger than the sum of its proper divisors (381981258159).

663441132321 is a wasteful number, since it uses less digits than its factorization.

663441132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701425596 (or 6701425593 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

Adding to 663441132321 its reverse (123231144366), we get a palindrome (786672276687).

The spelling of 663441132321 in words is "six hundred sixty-three billion, four hundred forty-one million, one hundred thirty-two thousand, three hundred twenty-one".