663071028 has 48 divisors (see below), whose sum is σ = 1624197120. Its totient is φ = 210261600.

The previous prime is 663071027. The next prime is 663071039. The reversal of 663071028 is 820170366.

It is a self number, because there is not a number n which added to its sum of digits gives 663071028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663071021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6843 + ... + 37053.

It is an arithmetic number, because the mean of its divisors is an integer number (33837440).

Almost surely, 2^663071028 is an apocalyptic number.

It is an amenable number.

663071028 is an abundant number, since it is smaller than the sum of its proper divisors (961126092).

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

663071028 is a wasteful number, since it uses less digits than its factorization.

663071028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30308 (or 30306 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 663071028 is about 25750.1655917006. The cubic root of 663071028 is about 872.0070928497.

The spelling of 663071028 in words is "six hundred sixty-three million, seventy-one thousand, twenty-eight".