6646340643067 has 8 divisors (see below), whose sum is σ = 6830914298192. Its totient is φ = 6462027136800.

The previous prime is 6646340643031. The next prime is 6646340643121. The reversal of 6646340643067 is 7603460436466.

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 6646340643067 - 2⁷ = 6646340642939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6646340642999 and 6646340643017.

It is not an unprimeable number, because it can be changed into a prime (6646340143067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64985409 + ... + 65087602.

It is an arithmetic number, because the mean of its divisors is an integer number (853864287274).

Almost surely, 2^{6646340643067} is an apocalyptic number.

6646340643067 is a deficient number, since it is larger than the sum of its proper divisors (184573655125).

6646340643067 is a wasteful number, since it uses less digits than its factorization.

6646340643067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130074429.

The product of its (nonzero) digits is 31352832, while the sum is 55.

The spelling of 6646340643067 in words is "six trillion, six hundred forty-six billion, three hundred forty million, six hundred forty-three thousand, sixty-seven".