6680243663 has 4 divisors (see below), whose sum is σ = 6717563640. Its totient is φ = 6642923688.

The previous prime is 6680243597. The next prime is 6680243683. The reversal of 6680243663 is 3663420866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6680243663 - 2¹² = 6680239567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680243683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18659720 + ... + 18660077.

It is an arithmetic number, because the mean of its divisors is an integer number (1679390910).

Almost surely, 2^6680243663 is an apocalyptic number.

6680243663 is a deficient number, since it is larger than the sum of its proper divisors (37319977).

6680243663 is a wasteful number, since it uses less digits than its factorization.

6680243663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37319976.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 6680243663 is about 81732.7575883746. The cubic root of 6680243663 is about 1883.3488356848.

The spelling of 6680243663 in words is "six billion, six hundred eighty million, two hundred forty-three thousand, six hundred sixty-three".