6686054639 has 4 divisors (see below), whose sum is σ = 7293877800. Its totient is φ = 6078231480.

The previous prime is 6686054587. The next prime is 6686054657. The reversal of 6686054639 is 9364506866.

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 6686054639 - 2²⁰ = 6685006063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686054339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303911564 + ... + 303911585.

It is an arithmetic number, because the mean of its divisors is an integer number (1823469450).

Almost surely, 2^6686054639 is an apocalyptic number.

6686054639 is a deficient number, since it is larger than the sum of its proper divisors (607823161).

6686054639 is a wasteful number, since it uses less digits than its factorization.

6686054639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607823160.

The product of its (nonzero) digits is 5598720, while the sum is 53.

The square root of 6686054639 is about 81768.2984964222. The cubic root of 6686054639 is about 1883.8947700168.

The spelling of 6686054639 in words is "six billion, six hundred eighty-six million, fifty-four thousand, six hundred thirty-nine".