123666410280 has 256 divisors, whose sum is σ = 428936601600. Its totient is φ = 27938534400.

The previous prime is 123666410267. The next prime is 123666410311. The reversal of 123666410280 is 82014666321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60649501 + ... + 60651539.

It is an arithmetic number, because the mean of its divisors is an integer number (1675533600).

Almost surely, 2^123666410280 is an apocalyptic number.

123666410280 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 123666410280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214468300800).

123666410280 is an abundant number, since it is smaller than the sum of its proper divisors (305270191320).

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

123666410280 is a wasteful number, since it uses less digits than its factorization.

123666410280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 123666410280 in words is "one hundred twenty-three billion, six hundred sixty-six million, four hundred ten thousand, two hundred eighty".