2666520201 has 16 divisors (see below), whose sum is σ = 3580502400. Its totient is φ = 1765146240.

The previous prime is 2666520179. The next prime is 2666520209. The reversal of 2666520201 is 1020256662.

It is not a de Polignac number, because 2666520201 - 2⁹ = 2666519689 is a prime.

It is a super-2 number, since 2×2666520201² = 14220659964682160802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666520209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306751 + ... + 315323.

It is an arithmetic number, because the mean of its divisors is an integer number (223781400).

Almost surely, 2^2666520201 is an apocalyptic number.

It is an amenable number.

2666520201 is a deficient number, since it is larger than the sum of its proper divisors (913982199).

2666520201 is a wasteful number, since it uses less digits than its factorization.

2666520201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2666520201 is about 51638.3597822394. The cubic root of 2666520201 is about 1386.6971598311.

Adding to 2666520201 its reverse (1020256662), we get a palindrome (3686776863).

The spelling of 2666520201 in words is "two billion, six hundred sixty-six million, five hundred twenty thousand, two hundred one".