663766340 has 12 divisors (see below), whose sum is σ = 1393909356. Its totient is φ = 265506528.

The previous prime is 663766339. The next prime is 663766351. The reversal of 663766340 is 43667366.

It can be written as a sum of positive squares in 2 ways, for example, as 69089344 + 594676996 = 8312^2 + 24386^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16594139 + ... + 16594178.

It is an arithmetic number, because the mean of its divisors is an integer number (116159113).

Almost surely, 2^663766340 is an apocalyptic number.

It is an amenable number.

663766340 is an abundant number, since it is smaller than the sum of its proper divisors (730143016).

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

663766340 is a wasteful number, since it uses less digits than its factorization.

663766340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33188326 (or 33188324 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 41.

The square root of 663766340 is about 25763.6631712185. The cubic root of 663766340 is about 872.3117888078.

The spelling of 663766340 in words is "six hundred sixty-three million, seven hundred sixty-six thousand, three hundred forty".