201166417 has 4 divisors (see below), whose sum is σ = 208103220. Its totient is φ = 194229616.

The previous prime is 201166403. The next prime is 201166451. The reversal of 201166417 is 714661102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159744321 + 41422096 = 12639^2 + 6436^2 .

It is a cyclic number.

It is not a de Polignac number, because 201166417 - 2⁷ = 201166289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201166517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3468358 + ... + 3468415.

It is an arithmetic number, because the mean of its divisors is an integer number (52025805).

Almost surely, 2^201166417 is an apocalyptic number.

It is an amenable number.

201166417 is a deficient number, since it is larger than the sum of its proper divisors (6936803).

201166417 is an equidigital number, since it uses as much as digits as its factorization.

201166417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936802.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 201166417 is about 14183.3147395099. The cubic root of 201166417 is about 585.9382193252.

The spelling of 201166417 in words is "two hundred one million, one hundred sixty-six thousand, four hundred seventeen".