663820122 has 16 divisors (see below), whose sum is σ = 1517303232. Its totient is φ = 189662880.

The previous prime is 663820067. The next prime is 663820123. The reversal of 663820122 is 221028366.

663820122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 663820122.

It is not an unprimeable number, because it can be changed into a prime (663820123) 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, 7902579 + ... + 7902662.

It is an arithmetic number, because the mean of its divisors is an integer number (94831452).

Almost surely, 2^663820122 is an apocalyptic number.

663820122 is an abundant number, since it is smaller than the sum of its proper divisors (853483110).

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

663820122 is a wasteful number, since it uses less digits than its factorization.

663820122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15805253.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 663820122 is about 25764.7069069299. The cubic root of 663820122 is about 872.3353480046.

Adding to 663820122 its reverse (221028366), we get a palindrome (884848488).

The spelling of 663820122 in words is "six hundred sixty-three million, eight hundred twenty thousand, one hundred twenty-two".