663042221632 has 28 divisors (see below), whose sum is σ = 1503685039360. Its totient is φ = 284160951936.

The previous prime is 663042221629. The next prime is 663042221651. The reversal of 663042221632 is 236122240366.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 663042221591 and 663042221600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740002032 + ... + 740002927.

It is an arithmetic number, because the mean of its divisors is an integer number (53703037120).

Almost surely, 2^663042221632 is an apocalyptic number.

It is an amenable number.

663042221632 is an abundant number, since it is smaller than the sum of its proper divisors (840642817728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663042221632 is a wasteful number, since it uses less digits than its factorization.

663042221632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480004978 (or 1480004968 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 663042221632 its reverse (236122240366), we get a palindrome (899164461998).

The spelling of 663042221632 in words is "six hundred sixty-three billion, forty-two million, two hundred twenty-one thousand, six hundred thirty-two".