1266887968 has 24 divisors (see below), whose sum is σ = 2580193980. Its totient is φ = 611600640.

The previous prime is 1266887959. The next prime is 1266887969. The reversal of 1266887968 is 8697886621.

It can be written as a sum of positive squares in 2 ways, for example, as 1125468304 + 141419664 = 33548^2 + 11892^2 .

It is not an unprimeable number, because it can be changed into a prime (1266887969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681663 + ... + 683518.

Almost surely, 2^1266887968 is an apocalyptic number.

It is an amenable number.

1266887968 is an abundant number, since it is smaller than the sum of its proper divisors (1313306012).

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

1266887968 is a wasteful number, since it uses less digits than its factorization.

1266887968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365220 (or 1365212 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The square root of 1266887968 is about 35593.3697196542. The cubic root of 1266887968 is about 1082.0468635565.

The spelling of 1266887968 in words is "one billion, two hundred sixty-six million, eight hundred eighty-seven thousand, nine hundred sixty-eight".