201666151 has 8 divisors (see below), whose sum is σ = 202845104. Its totient is φ = 200491200.

The previous prime is 201666131. The next prime is 201666187. The reversal of 201666151 is 151666102.

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 201666151 - 2¹⁷ = 201535079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201666131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183961 + ... + 185053.

It is an arithmetic number, because the mean of its divisors is an integer number (25355638).

Almost surely, 2^201666151 is an apocalyptic number.

201666151 is a deficient number, since it is larger than the sum of its proper divisors (1178953).

201666151 is a wasteful number, since it uses less digits than its factorization.

201666151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 201666151 is about 14200.9207800058. The cubic root of 201666151 is about 586.4230105102.

The spelling of 201666151 in words is "two hundred one million, six hundred sixty-six thousand, one hundred fifty-one".