6880688639 has 8 divisors (see below), whose sum is σ = 7507911168. Its totient is φ = 6253750360.

The previous prime is 6880688627. The next prime is 6880688663. The reversal of 6880688639 is 9368860886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6880688639 is a prime.

It is a super-2 number, since 2×6880688639² = 94687752293727344642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6880688699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18767 + ... + 118800.

It is an arithmetic number, because the mean of its divisors is an integer number (938488896).

Almost surely, 2^6880688639 is an apocalyptic number.

6880688639 is a deficient number, since it is larger than the sum of its proper divisors (627222529).

6880688639 is a wasteful number, since it uses less digits than its factorization.

6880688639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142125.

The product of its (nonzero) digits is 23887872, while the sum is 62.

The square root of 6880688639 is about 82949.9164496264. The cubic root of 6880688639 is about 1902.0005372800. Note that the first 3 decimals are identical.

The spelling of 6880688639 in words is "six billion, eight hundred eighty million, six hundred eighty-eight thousand, six hundred thirty-nine".