6686538061 has 8 divisors (see below), whose sum is σ = 7644264320. Its totient is φ = 5729438448.

The previous prime is 6686538041. The next prime is 6686538071. The reversal of 6686538061 is 1608356866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6686538061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6686537996 and 6686538014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686538031) 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 7 ways as a sum of consecutive naturals, for example, 133566 + ... + 176671.

It is an arithmetic number, because the mean of its divisors is an integer number (955533040).

Almost surely, 2^6686538061 is an apocalyptic number.

It is an amenable number.

6686538061 is a deficient number, since it is larger than the sum of its proper divisors (957726259).

6686538061 is a wasteful number, since it uses less digits than its factorization.

6686538061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313323.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 6686538061 is about 81771.2544908050. The cubic root of 6686538061 is about 1883.9401726884.

The spelling of 6686538061 in words is "six billion, six hundred eighty-six million, five hundred thirty-eight thousand, sixty-one".