216716660161 has 8 divisors (see below), whose sum is σ = 229669051104. Its totient is φ = 203786975040.

The previous prime is 216716660141. The next prime is 216716660231. The reversal of 216716660161 is 161066617612.

216716660161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 216716660161 - 2²³ = 216708271553 is a prime.

It is a super-2 number, since 2×216716660161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216716660141) 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, 5656795 + ... + 5694976.

It is an arithmetic number, because the mean of its divisors is an integer number (28708631388).

Almost surely, 2^216716660161 is an apocalyptic number.

It is an amenable number.

216716660161 is a deficient number, since it is larger than the sum of its proper divisors (12952390943).

216716660161 is a wasteful number, since it uses less digits than its factorization.

216716660161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11352911.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 216716660161 in words is "two hundred sixteen billion, seven hundred sixteen million, six hundred sixty thousand, one hundred sixty-one".