67663643808 has 48 divisors (see below), whose sum is σ = 177630981696. Its totient is φ = 22552780800.

The previous prime is 67663643807. The next prime is 67663643849. The reversal of 67663643808 is 80834636676.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (67663643807) 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 7 ways as a sum of consecutive naturals, for example, 1904608 + ... + 1939808.

It is an arithmetic number, because the mean of its divisors is an integer number (3700645452).

Almost surely, 2^67663643808 is an apocalyptic number.

It is an amenable number.

67663643808 is an abundant number, since it is smaller than the sum of its proper divisors (109967337888).

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

67663643808 is a wasteful number, since it uses less digits than its factorization.

67663643808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55237 (or 55229 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 57.

The spelling of 67663643808 in words is "sixty-seven billion, six hundred sixty-three million, six hundred forty-three thousand, eight hundred eight".