201666403005 has 8 divisors (see below), whose sum is σ = 322666244832. Its totient is φ = 107555414928.

The previous prime is 201666402997. The next prime is 201666403031. The reversal of 201666403005 is 500304666102.

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

It is not a de Polignac number, because 201666403005 - 2³ = 201666402997 is a prime.

It is a congruent number.

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, 6722213419 + ... + 6722213448.

It is an arithmetic number, because the mean of its divisors is an integer number (40333280604).

Almost surely, 2^201666403005 is an apocalyptic number.

It is an amenable number.

201666403005 is a deficient number, since it is larger than the sum of its proper divisors (120999841827).

201666403005 is a wasteful number, since it uses less digits than its factorization.

201666403005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13444426875.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 201666403005 in words is "two hundred one billion, six hundred sixty-six million, four hundred three thousand, five".