6717616601666 has 8 divisors (see below), whose sum is σ = 10076436335244. Its totient is φ = 3358804489920.

The previous prime is 6717616601639. The next prime is 6717616601681. The reversal of 6717616601666 is 6661066167176.

It can be written as a sum of positive squares in 2 ways, for example, as 5418862344025 + 1298754257641 = 2327845^2 + 1139629^2 .

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

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, 1554446 + ... + 3981398.

Almost surely, 2^{6717616601666} is an apocalyptic number.

6717616601666 is a deficient number, since it is larger than the sum of its proper divisors (3358819733578).

6717616601666 is a wasteful number, since it uses less digits than its factorization.

6717616601666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810916.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The spelling of 6717616601666 in words is "six trillion, seven hundred seventeen billion, six hundred sixteen million, six hundred one thousand, six hundred sixty-six".