266720201 has 4 divisors (see below), whose sum is σ = 290967504. Its totient is φ = 242472900.

The previous prime is 266720197. The next prime is 266720227. The reversal of 266720201 is 102027662.

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 266720201 - 2² = 266720197 is a prime.

It is a super-2 number, since 2×266720201² = 142279331242960802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266720261) 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, 12123635 + ... + 12123656.

It is an arithmetic number, because the mean of its divisors is an integer number (72741876).

Almost surely, 2^266720201 is an apocalyptic number.

It is an amenable number.

266720201 is a deficient number, since it is larger than the sum of its proper divisors (24247303).

266720201 is a wasteful number, since it uses less digits than its factorization.

266720201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24247302.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 266720201 is about 16331.5706838014. The cubic root of 266720201 is about 643.7026592139.

Adding to 266720201 its reverse (102027662), we get a palindrome (368747863).

The spelling of 266720201 in words is "two hundred sixty-six million, seven hundred twenty thousand, two hundred one".