201686668465 has 8 divisors (see below), whose sum is σ = 242575312320. Its totient is φ = 160981794672.

The previous prime is 201686668439. The next prime is 201686668481. The reversal of 201686668465 is 564866686102.

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 201686668465 - 2⁵ = 201686668433 is a prime.

It is a super-3 number, since 3×201686668465³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45940099 + ... + 45944488.

It is an arithmetic number, because the mean of its divisors is an integer number (30321914040).

Almost surely, 2^201686668465 is an apocalyptic number.

It is an amenable number.

201686668465 is a deficient number, since it is larger than the sum of its proper divisors (40888643855).

201686668465 is an equidigital number, since it uses as much as digits as its factorization.

201686668465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91885031.

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 201686668465 in words is "two hundred one billion, six hundred eighty-six million, six hundred sixty-eight thousand, four hundred sixty-five".