6663440164 has 12 divisors (see below), whose sum is σ = 11852184988. Its totient is φ = 3277101600.

The previous prime is 6663440143. The next prime is 6663440233. The reversal of 6663440164 is 4610443666.

It can be written as a sum of positive squares in 2 ways, for example, as 3340840000 + 3322600164 = 57800^2 + 57642^2 .

It is a hoax number, since the sum of its digits (40) 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13654347 + ... + 13654834.

Almost surely, 2^6663440164 is an apocalyptic number.

It is an amenable number.

6663440164 is a deficient number, since it is larger than the sum of its proper divisors (5188744824).

6663440164 is a wasteful number, since it uses less digits than its factorization.

6663440164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27309246 (or 27309244 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 6663440164 is about 81629.8974886040. The cubic root of 6663440164 is about 1881.7683832408.

The spelling of 6663440164 in words is "six billion, six hundred sixty-three million, four hundred forty thousand, one hundred sixty-four".