1266173361 has 12 divisors (see below), whose sum is σ = 1830820992. Its totient is φ = 843236856.

The previous prime is 1266173353. The next prime is 1266173407. The reversal of 1266173361 is 1633716621.

1266173361 is a `hidden beast` number, since 1 + 2 + 6 + 617 + 3 + 36 + 1 = 666.

It is not a de Polignac number, because 1266173361 - 2³ = 1266173353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1266173341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64041 + ... + 81446.

It is an arithmetic number, because the mean of its divisors is an integer number (152568416).

Almost surely, 2^1266173361 is an apocalyptic number.

It is an amenable number.

1266173361 is a deficient number, since it is larger than the sum of its proper divisors (564647631).

1266173361 is a wasteful number, since it uses less digits than its factorization.

1266173361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146460 (or 146457 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 1266173361 is about 35583.3298188913. The cubic root of 1266173361 is about 1081.8433770832.

Adding to 1266173361 its reverse (1633716621), we get a palindrome (2899889982).

The spelling of 1266173361 in words is "one billion, two hundred sixty-six million, one hundred seventy-three thousand, three hundred sixty-one".