1266298880 has 312 divisors, whose sum is σ = 3869559456. Its totient is φ = 389283840.

The previous prime is 1266298877. The next prime is 1266298903. The reversal of 1266298880 is 888926621.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 17346524 + ... + 17346596.

Almost surely, 2^1266298880 is an apocalyptic number.

1266298880 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 1266298880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934779728).

1266298880 is an abundant number, since it is smaller than the sum of its proper divisors (2603260576).

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

1266298880 is an equidigital number, since it uses as much as digits as its factorization.

1266298880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 1266298880 is about 35585.0935083779. The cubic root of 1266298880 is about 1081.8791245346.

The spelling of 1266298880 in words is "one billion, two hundred sixty-six million, two hundred ninety-eight thousand, eight hundred eighty".