1266115968 has 128 divisors (see below), whose sum is σ = 4024389600. Its totient is φ = 389560320.

The previous prime is 1266115967. The next prime is 1266115969. The reversal of 1266115968 is 8695116621.

1266115968 is a `hidden beast` number, since 1 + 26 + 611 + 5 + 9 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1266115967) and next prime (1266115969).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266115967) 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, 30838 + ... + 59018.

Almost surely, 2^1266115968 is an apocalyptic number.

1266115968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266115968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012194800).

1266115968 is an abundant number, since it is smaller than the sum of its proper divisors (2758273632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266115968 is a wasteful number, since it uses less digits than its factorization.

1266115968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28217 (or 28199 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1266115968 is about 35582.5233506563. The cubic root of 1266115968 is about 1081.8270309342.

The spelling of 1266115968 in words is "one billion, two hundred sixty-six million, one hundred fifteen thousand, nine hundred sixty-eight".