6698625209 has 8 divisors (see below), whose sum is σ = 7093612008. Its totient is φ = 6303744000.

The previous prime is 6698625203. The next prime is 6698625217. The reversal of 6698625209 is 9025268966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17197609 + 6681427600 = 4147^2 + 81740^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6698625209 - 2¹² = 6698621113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6698625203) 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, 131129 + ... + 174905.

It is an arithmetic number, because the mean of its divisors is an integer number (886701501).

Almost surely, 2^6698625209 is an apocalyptic number.

It is an amenable number.

6698625209 is a deficient number, since it is larger than the sum of its proper divisors (394986799).

6698625209 is a wasteful number, since it uses less digits than its factorization.

6698625209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52795.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The square root of 6698625209 is about 81845.1294152560. The cubic root of 6698625209 is about 1885.0746788680.

The spelling of 6698625209 in words is "six billion, six hundred ninety-eight million, six hundred twenty-five thousand, two hundred nine".