1266996000 has 192 divisors, whose sum is σ = 4369921920. Its totient is φ = 320025600.

The previous prime is 1266995987. The next prime is 1266996007. The reversal of 1266996000 is 6996621.

It is a self number, because there is not a number n which added to its sum of digits gives 1266996000.

It is not an unprimeable number, because it can be changed into a prime (1266996007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225222 + ... + 230778.

It is an arithmetic number, because the mean of its divisors is an integer number (22760010).

Almost surely, 2^1266996000 is an apocalyptic number.

1266996000 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 1266996000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2184960960).

1266996000 is an abundant number, since it is smaller than the sum of its proper divisors (3102925920).

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

1266996000 is a wasteful number, since it uses less digits than its factorization.

1266996000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 1266996000 is about 35594.8872733150. The cubic root of 1266996000 is about 1082.0776193316.

The spelling of 1266996000 in words is "one billion, two hundred sixty-six million, nine hundred ninety-six thousand".