6686075705 has 4 divisors (see below), whose sum is σ = 8023290852. Its totient is φ = 5348860560.

The previous prime is 6686075687. The next prime is 6686075729. The reversal of 6686075705 is 5075706866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1988892409 + 4697183296 = 44597^2 + 68536^2 .

It is not a de Polignac number, because 6686075705 - 2¹⁶ = 6686010169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 668607566 + ... + 668607575.

It is an arithmetic number, because the mean of its divisors is an integer number (2005822713).

Almost surely, 2^6686075705 is an apocalyptic number.

It is an amenable number.

6686075705 is a deficient number, since it is larger than the sum of its proper divisors (1337215147).

6686075705 is a wasteful number, since it uses less digits than its factorization.

6686075705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337215146.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The square root of 6686075705 is about 81768.4273115241. The cubic root of 6686075705 is about 1883.8967485671.

The spelling of 6686075705 in words is "six billion, six hundred eighty-six million, seventy-five thousand, seven hundred five".