2117206016661 has 8 divisors (see below), whose sum is σ = 2945677936320. Its totient is φ = 1350102387392.

The previous prime is 2117206016641. The next prime is 2117206016677. The reversal of 2117206016661 is 1666106027112.

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 2117206016661 - 2¹³ = 2117206008469 is a prime.

It is a super-2 number, since 2×2117206016661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117206016641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15342072516 + ... + 15342072653.

It is an arithmetic number, because the mean of its divisors is an integer number (368209742040).

Almost surely, 2^{2117206016661} is an apocalyptic number.

It is an amenable number.

2117206016661 is a deficient number, since it is larger than the sum of its proper divisors (828471919659).

2117206016661 is a wasteful number, since it uses less digits than its factorization.

2117206016661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30684145195.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 2117206016661 in words is "two trillion, one hundred seventeen billion, two hundred six million, sixteen thousand, six hundred sixty-one".