12661246080 has 1280 divisors, whose sum is σ = 56729756160. Its totient is φ = 2627665920.

The previous prime is 12661246079. The next prime is 12661246109. The reversal of 12661246080 is 8064216621.

12661246080 is a `hidden beast` number, since 1 + 26 + 6 + 1 + 24 + 608 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 308810860 + ... + 308810900.

It is an arithmetic number, because the mean of its divisors is an integer number (44320122).

Almost surely, 2^12661246080 is an apocalyptic number.

12661246080 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 12661246080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28364878080).

12661246080 is an abundant number, since it is smaller than the sum of its proper divisors (44068510080).

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

12661246080 is a wasteful number, since it uses less digits than its factorization.

12661246080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 12661246080 in words is "twelve billion, six hundred sixty-one million, two hundred forty-six thousand, eighty".