6663563240 has 32 divisors (see below), whose sum is σ = 15055250760. Its totient is φ = 2654361600.

The previous prime is 6663563239. The next prime is 6663563261. The reversal of 6663563240 is 423653666.

It can be written as a sum of positive squares in 4 ways, for example, as 5594142436 + 1069420804 = 74794^2 + 32702^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335981 + ... + 355260.

Almost surely, 2^6663563240 is an apocalyptic number.

It is an amenable number.

6663563240 is an abundant number, since it is smaller than the sum of its proper divisors (8391687520).

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

6663563240 is a wasteful number, since it uses less digits than its factorization.

6663563240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691493 (or 691489 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 41.

The square root of 6663563240 is about 81630.6513510703. The cubic root of 6663563240 is about 1881.7799688029.

The spelling of 6663563240 in words is "six billion, six hundred sixty-three million, five hundred sixty-three thousand, two hundred forty".