206616655671 has 8 divisors (see below), whose sum is σ = 275545381104. Its totient is φ = 137716183680.

The previous prime is 206616655643. The next prime is 206616655699. The reversal of 206616655671 is 176556616602.

It is an interprime number because it is at equal distance from previous prime (206616655643) and next prime (206616655699).

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

It is not a de Polignac number, because 206616655671 - 2⁵ = 206616655639 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206616655171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7046290 + ... + 7075551.

It is an arithmetic number, because the mean of its divisors is an integer number (34443172638).

Almost surely, 2^206616655671 is an apocalyptic number.

206616655671 is a deficient number, since it is larger than the sum of its proper divisors (68928725433).

206616655671 is a wasteful number, since it uses less digits than its factorization.

206616655671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126721.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 206616655671 in words is "two hundred six billion, six hundred sixteen million, six hundred fifty-five thousand, six hundred seventy-one".