1666374488064 has 1560 divisors, whose sum is σ = 6141653213696. Its totient is φ = 446703206400.

The previous prime is 1666374488057. The next prime is 1666374488131. The reversal of 1666374488064 is 4608844736661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1666374487992 and 1666374488010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 16178393037 + ... + 16178393139.

Almost surely, 2^{1666374488064} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666374488064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070826606848).

1666374488064 is an abundant number, since it is smaller than the sum of its proper divisors (4475278725632).

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

1666374488064 is a wasteful number, since it uses less digits than its factorization.

1666374488064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 63.

The spelling of 1666374488064 in words is "one trillion, six hundred sixty-six billion, three hundred seventy-four million, four hundred eighty-eight thousand, sixty-four".