6681816626 has 8 divisors (see below), whose sum is σ = 10082741760. Its totient is φ = 3320902708.

The previous prime is 6681816619. The next prime is 6681816637. The reversal of 6681816626 is 6266181866.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10002386 + ... + 10003053.

It is an arithmetic number, because the mean of its divisors is an integer number (1260342720).

Almost surely, 2^6681816626 is an apocalyptic number.

6681816626 is a deficient number, since it is larger than the sum of its proper divisors (3400925134).

6681816626 is a wasteful number, since it uses less digits than its factorization.

6681816626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20005608.

The product of its digits is 995328, while the sum is 50.

The square root of 6681816626 is about 81742.3796203658. The cubic root of 6681816626 is about 1883.4966449414.

The spelling of 6681816626 in words is "six billion, six hundred eighty-one million, eight hundred sixteen thousand, six hundred twenty-six".