1266846720 has 176 divisors, whose sum is σ = 4115747328. Its totient is φ = 332513280.

The previous prime is 1266846709. The next prime is 1266846727. The reversal of 1266846720 is 276486621.

1266846720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1266846720² = 3209801223949516800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1266846727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1028505 + ... + 1029735.

It is an arithmetic number, because the mean of its divisors is an integer number (23384928).

Almost surely, 2^1266846720 is an apocalyptic number.

1266846720 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 1266846720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2057873664).

1266846720 is an abundant number, since it is smaller than the sum of its proper divisors (2848900608).

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

1266846720 is a wasteful number, since it uses less digits than its factorization.

1266846720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1266846720 is about 35592.7902811791. The cubic root of 1266846720 is about 1082.0351201468.

The spelling of 1266846720 in words is "one billion, two hundred sixty-six million, eight hundred forty-six thousand, seven hundred twenty".