66836201 has 4 divisors (see below), whose sum is σ = 67525332. Its totient is φ = 66147072.

The previous prime is 66836179. The next prime is 66836207. The reversal of 66836201 is 10263866.

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 39000025 + 27836176 = 6245^2 + 5276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66836201 is a prime.

It is a super-2 number, since 2×66836201² = 8934155528224802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66836207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344420 + ... + 344613.

It is an arithmetic number, because the mean of its divisors is an integer number (16881333).

Almost surely, 2^66836201 is an apocalyptic number.

It is an amenable number.

66836201 is a deficient number, since it is larger than the sum of its proper divisors (689131).

66836201 is an equidigital number, since it uses as much as digits as its factorization.

66836201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689130.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66836201 is about 8175.3410326420. The cubic root of 66836201 is about 405.8235561127.

The spelling of 66836201 in words is "sixty-six million, eight hundred thirty-six thousand, two hundred one".