1266246178560 has 432 divisors, whose sum is σ = 4839896355840. Its totient is φ = 303080693760.

The previous prime is 1266246178529. The next prime is 1266246178573. The reversal of 1266246178560 is 658716426621.

1266246178560 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 2 + 4 + 6 + 1 + 78 + 560 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1266246178497 and 1266246178506.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 9947637 + ... + 10074123.

Almost surely, 2^{1266246178560} is an apocalyptic number.

1266246178560 is a gapful number since it is divisible by the number (10) 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 1266246178560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419948177920).

1266246178560 is an abundant number, since it is smaller than the sum of its proper divisors (3573650177280).

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

1266246178560 is a wasteful number, since it uses less digits than its factorization.

1266246178560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126604 (or 126587 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 1266246178560 in words is "one trillion, two hundred sixty-six billion, two hundred forty-six million, one hundred seventy-eight thousand, five hundred sixty".