1666384508010 has 128 divisors (see below), whose sum is σ = 4242060979200. Its totient is φ = 417768261120.

The previous prime is 1666384507969. The next prime is 1666384508053. The reversal of 1666384508010 is 108054836661.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41713726 + ... + 41753654.

It is an arithmetic number, because the mean of its divisors is an integer number (33141101400).

Almost surely, 2^{1666384508010} is an apocalyptic number.

1666384508010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666384508010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121030489600).

1666384508010 is an abundant number, since it is smaller than the sum of its proper divisors (2575676471190).

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

1666384508010 is a wasteful number, since it uses less digits than its factorization.

1666384508010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40516.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 1666384508010 in words is "one trillion, six hundred sixty-six billion, three hundred eighty-four million, five hundred eight thousand, ten".