18166680276480 has 320 divisors, whose sum is σ = 64614992143680. Its totient is φ = 4838034604032.

The previous prime is 18166680276413. The next prime is 18166680276499. The reversal of 18166680276480 is 8467208666181.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52150242 + ... + 52497438.

It is an arithmetic number, because the mean of its divisors is an integer number (201921850449).

Almost surely, 2^{18166680276480} is an apocalyptic number.

18166680276480 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 18166680276480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32307496071840).

18166680276480 is an abundant number, since it is smaller than the sum of its proper divisors (46448311867200).

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

18166680276480 is an equidigital number, since it uses as much as digits as its factorization.

18166680276480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347986 (or 347964 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 18166680276480 in words is "eighteen trillion, one hundred sixty-six billion, six hundred eighty million, two hundred seventy-six thousand, four hundred eighty".