1266965056 has 56 divisors (see below), whose sum is σ = 2922056640. Its totient is φ = 533770752.

The previous prime is 1266965033. The next prime is 1266965057. The reversal of 1266965056 is 6505696621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1266964997 and 1266965015.

It is not an unprimeable number, because it can be changed into a prime (1266965057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2466 + ... + 50398.

Almost surely, 2^1266965056 is an apocalyptic number.

1266965056 is a gapful number since it is divisible by the number (16) 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 1266965056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1461028320).

1266965056 is an abundant number, since it is smaller than the sum of its proper divisors (1655091584).

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

1266965056 is an equidigital number, since it uses as much as digits as its factorization.

1266965056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48011 (or 48001 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The square root of 1266965056 is about 35594.4526014940. The cubic root of 1266965056 is about 1082.0688100214.

The spelling of 1266965056 in words is "one billion, two hundred sixty-six million, nine hundred sixty-five thousand, fifty-six".