6686376249 has 16 divisors (see below), whose sum is σ = 10361456640. Its totient is φ = 3756026640.

The previous prime is 6686376197. The next prime is 6686376251. The reversal of 6686376249 is 9426736866.

It is a happy number.

It is not a de Polignac number, because 6686376249 - 2¹³ = 6686368057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6686376149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2697057 + ... + 2699534.

It is an arithmetic number, because the mean of its divisors is an integer number (647591040).

Almost surely, 2^6686376249 is an apocalyptic number.

It is an amenable number.

6686376249 is a deficient number, since it is larger than the sum of its proper divisors (3675080391).

6686376249 is a wasteful number, since it uses less digits than its factorization.

6686376249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5396660.

The product of its digits is 15676416, while the sum is 57.

The square root of 6686376249 is about 81770.2650662207. The cubic root of 6686376249 is about 1883.9249756570.

The spelling of 6686376249 in words is "six billion, six hundred eighty-six million, three hundred seventy-six thousand, two hundred forty-nine".