6687031309 has 16 divisors (see below), whose sum is σ = 7683451776. Its totient is φ = 5700960000.

The previous prime is 6687031303. The next prime is 6687031333. The reversal of 6687031309 is 9031307866.

It is a cyclic number.

It is not a de Polignac number, because 6687031309 - 2³ = 6687031301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687031301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1503529 + ... + 1507969.

It is an arithmetic number, because the mean of its divisors is an integer number (480215736).

Almost surely, 2^6687031309 is an apocalyptic number.

It is an amenable number.

6687031309 is a deficient number, since it is larger than the sum of its proper divisors (996420467).

6687031309 is a wasteful number, since it uses less digits than its factorization.

6687031309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 6687031309 is about 81774.2704583783. The cubic root of 6687031309 is about 1883.9864959559.

The spelling of 6687031309 in words is "six billion, six hundred eighty-seven million, thirty-one thousand, three hundred nine".