1266623313 has 8 divisors (see below), whose sum is σ = 1689506400. Its totient is φ = 844077888.

The previous prime is 1266623311. The next prime is 1266623321. The reversal of 1266623313 is 3133266621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1266623313 - 2¹ = 1266623311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266623311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75528 + ... + 90761.

It is an arithmetic number, because the mean of its divisors is an integer number (211188300).

Almost surely, 2^1266623313 is an apocalyptic number.

It is an amenable number.

1266623313 is a deficient number, since it is larger than the sum of its proper divisors (422883087).

1266623313 is a wasteful number, since it uses less digits than its factorization.

1266623313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168831.

The product of its digits is 23328, while the sum is 33.

The square root of 1266623313 is about 35589.6517684565. The cubic root of 1266623313 is about 1081.9715111804.

Adding to 1266623313 its reverse (3133266621), we get a palindrome (4399889934).

The spelling of 1266623313 in words is "one billion, two hundred sixty-six million, six hundred twenty-three thousand, three hundred thirteen".