663065380 has 12 divisors (see below), whose sum is σ = 1392437340. Its totient is φ = 265226144.

The previous prime is 663065353. The next prime is 663065387. The reversal of 663065380 is 83560366.

It can be written as a sum of positive squares in 2 ways, for example, as 482593024 + 180472356 = 21968^2 + 13434^2 .

It is not an unprimeable number, because it can be changed into a prime (663065387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16576615 + ... + 16576654.

It is an arithmetic number, because the mean of its divisors is an integer number (116036445).

Almost surely, 2^663065380 is an apocalyptic number.

It is an amenable number.

663065380 is an abundant number, since it is smaller than the sum of its proper divisors (729371960).

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

663065380 is a wasteful number, since it uses less digits than its factorization.

663065380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33153278 (or 33153276 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 663065380 is about 25750.0559222694. The cubic root of 663065380 is about 872.0046169410.

It can be divided in two parts, 6630 and 65380, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 663065380 in words is "six hundred sixty-three million, sixty-five thousand, three hundred eighty".