1266078495089 has 8 divisors (see below), whose sum is σ = 1310834261160. Its totient is φ = 1221395921536.

The previous prime is 1266078495067. The next prime is 1266078495103. The reversal of 1266078495089 is 9805948706621.

It can be written as a sum of positive squares in 4 ways, for example, as 290853118864 + 975225376225 = 539308^2 + 987535^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1266078495089 - 2⁸ = 1266078494833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266078495289) 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, 18262922 + ... + 18332115.

It is an arithmetic number, because the mean of its divisors is an integer number (163854282645).

Almost surely, 2^{1266078495089} is an apocalyptic number.

It is an amenable number.

1266078495089 is a deficient number, since it is larger than the sum of its proper divisors (44755766071).

1266078495089 is a wasteful number, since it uses less digits than its factorization.

1266078495089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36596259.

The product of its (nonzero) digits is 52254720, while the sum is 65.

The spelling of 1266078495089 in words is "one trillion, two hundred sixty-six billion, seventy-eight million, four hundred ninety-five thousand, eighty-nine".