3666506201 has 4 divisors (see below), whose sum is σ = 3704305332. Its totient is φ = 3628707072.

The previous prime is 3666506167. The next prime is 3666506227. The reversal of 3666506201 is 1026056663.

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 2204208601 + 1462297600 = 46949^2 + 38240^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666506201 - 2¹⁴ = 3666489817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666506281) 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, 18899420 + ... + 18899613.

It is an arithmetic number, because the mean of its divisors is an integer number (926076333).

Almost surely, 2^3666506201 is an apocalyptic number.

It is an amenable number.

3666506201 is a deficient number, since it is larger than the sum of its proper divisors (37799131).

3666506201 is an equidigital number, since it uses as much as digits as its factorization.

3666506201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37799130.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 3666506201 is about 60551.6820658188. The cubic root of 3666506201 is about 1541.9991747144. Note that the first 3 decimals are identical.

The spelling of 3666506201 in words is "three billion, six hundred sixty-six million, five hundred six thousand, two hundred one".