663273388 has 12 divisors (see below), whose sum is σ = 1171001160. Its totient is φ = 328701632.

The previous prime is 663273383. The next prime is 663273421. The reversal of 663273388 is 883372366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (663273383) 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 3 ways as a sum of consecutive naturals, for example, 733258 + ... + 734161.

It is an arithmetic number, because the mean of its divisors is an integer number (97583430).

Almost surely, 2^663273388 is an apocalyptic number.

It is an amenable number.

663273388 is a deficient number, since it is larger than the sum of its proper divisors (507727772).

663273388 is a wasteful number, since it uses less digits than its factorization.

663273388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467536 (or 1467534 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 663273388 is about 25754.0945870749. The cubic root of 663273388 is about 872.0957919483.

The spelling of 663273388 in words is "six hundred sixty-three million, two hundred seventy-three thousand, three hundred eighty-eight".