1266119999 has 16 divisors (see below), whose sum is σ = 1367604000. Its totient is φ = 1167765504.

The previous prime is 1266119989. The next prime is 1266120017. The reversal of 1266119999 is 9999116621.

It is a cyclic number.

It is not a de Polignac number, because 1266119999 - 2²⁸ = 997684543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266119999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266119969) 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, 348239 + ... + 351855.

It is an arithmetic number, because the mean of its divisors is an integer number (85475250).

Almost surely, 2^1266119999 is an apocalyptic number.

1266119999 is a deficient number, since it is larger than the sum of its proper divisors (101484001).

1266119999 is a wasteful number, since it uses less digits than its factorization.

1266119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042.

The product of its digits is 472392, while the sum is 53.

The square root of 1266119999 is about 35582.5799935867. The cubic root of 1266119999 is about 1081.8281790229.

The spelling of 1266119999 in words is "one billion, two hundred sixty-six million, one hundred nineteen thousand, nine hundred ninety-nine".