6686962655549 has 16 divisors (see below), whose sum is σ = 7613640105984. Its totient is φ = 5813525190000.

The previous prime is 6686962655521. The next prime is 6686962655551. The reversal of 6686962655549 is 9455562696866.

It is a de Polignac number, because none of the positive numbers 2^k-6686962655549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6686962655549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686962655519) 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 15 ways as a sum of consecutive naturals, for example, 1579589 + ... + 3983594.

It is an arithmetic number, because the mean of its divisors is an integer number (475852506624).

Almost surely, 2^{6686962655549} is an apocalyptic number.

It is an amenable number.

6686962655549 is a deficient number, since it is larger than the sum of its proper divisors (926677450435).

6686962655549 is a wasteful number, since it uses less digits than its factorization.

6686962655549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567968.

The product of its digits is 5038848000, while the sum is 77.

The spelling of 6686962655549 in words is "six trillion, six hundred eighty-six billion, nine hundred sixty-two million, six hundred fifty-five thousand, five hundred forty-nine".