6681720422 has 8 divisors (see below), whose sum is σ = 10793548416. Its totient is φ = 3083870952.

The previous prime is 6681720407. The next prime is 6681720467. The reversal of 6681720422 is 2240271866.

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

It is a congruent 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, 128494598 + ... + 128494649.

It is an arithmetic number, because the mean of its divisors is an integer number (1349193552).

Almost surely, 2^6681720422 is an apocalyptic number.

6681720422 is a deficient number, since it is larger than the sum of its proper divisors (4111827994).

6681720422 is a wasteful number, since it uses less digits than its factorization.

6681720422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256989262.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 6681720422 is about 81741.7911597244. The cubic root of 6681720422 is about 1883.4876054445.

The spelling of 6681720422 in words is "six billion, six hundred eighty-one million, seven hundred twenty thousand, four hundred twenty-two".