266642201 has 4 divisors (see below), whose sum is σ = 304733952. Its totient is φ = 228550452.

The previous prime is 266642179. The next prime is 266642221. The reversal of 266642201 is 102246662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266642201 - 2⁶ = 266642137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266642221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19045865 + ... + 19045878.

It is an arithmetic number, because the mean of its divisors is an integer number (76183488).

Almost surely, 2^266642201 is an apocalyptic number.

It is an amenable number.

266642201 is a deficient number, since it is larger than the sum of its proper divisors (38091751).

266642201 is an equidigital number, since it uses as much as digits as its factorization.

266642201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38091750.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 266642201 is about 16329.1824963775. The cubic root of 266642201 is about 643.6399046839.

Adding to 266642201 its reverse (102246662), we get a palindrome (368888863).

The spelling of 266642201 in words is "two hundred sixty-six million, six hundred forty-two thousand, two hundred one".