1266222376989 has 12 divisors (see below), whose sum is σ = 1871522480256. Its totient is φ = 824516896392.

The previous prime is 1266222376933. The next prime is 1266222377003. The reversal of 1266222376989 is 9896732226621.

It is a happy number.

1266222376989 is a `hidden beast` number, since 1 + 266 + 2 + 2 + 237 + 69 + 89 = 666.

It is not a de Polignac number, because 1266222376989 - 2¹¹ = 1266222374941 is a prime.

It is a super-2 number, since 2×1266222376989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266222376589) 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, 1635945837 + ... + 1635946610.

It is an arithmetic number, because the mean of its divisors is an integer number (155960206688).

Almost surely, 2^{1266222376989} is an apocalyptic number.

It is an amenable number.

1266222376989 is a deficient number, since it is larger than the sum of its proper divisors (605300103267).

1266222376989 is a wasteful number, since it uses less digits than its factorization.

1266222376989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271892496 (or 3271892493 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The spelling of 1266222376989 in words is "one trillion, two hundred sixty-six billion, two hundred twenty-two million, three hundred seventy-six thousand, nine hundred eighty-nine".