1266560211 has 16 divisors (see below), whose sum is σ = 1992255488. Its totient is φ = 700401600.

The previous prime is 1266560201. The next prime is 1266560213. The reversal of 1266560211 is 1120656621.

It is not a de Polignac number, because 1266560211 - 2⁵ = 1266560179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266560213) 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, 972130 + ... + 973431.

It is an arithmetic number, because the mean of its divisors is an integer number (124515968).

Almost surely, 2^1266560211 is an apocalyptic number.

1266560211 is a deficient number, since it is larger than the sum of its proper divisors (725695277).

1266560211 is a wasteful number, since it uses less digits than its factorization.

1266560211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945602.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1266560211 is about 35588.7652356751. The cubic root of 1266560211 is about 1081.9535432759.

The spelling of 1266560211 in words is "one billion, two hundred sixty-six million, five hundred sixty thousand, two hundred eleven".