1666413889040 has 80 divisors (see below), whose sum is σ = 4079418067200. Its totient is φ = 631314487296.

The previous prime is 1666413889027. The next prime is 1666413889061. The reversal of 1666413889040 is 409883146661.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5620841 + ... + 5909879.

It is an arithmetic number, because the mean of its divisors is an integer number (50992725840).

Almost surely, 2^{1666413889040} is an apocalyptic number.

1666413889040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666413889040 is an abundant number, since it is smaller than the sum of its proper divisors (2413004178160).

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

1666413889040 is a wasteful number, since it uses less digits than its factorization.

1666413889040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292864 (or 292858 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 1666413889040 in words is "one trillion, six hundred sixty-six billion, four hundred thirteen million, eight hundred eighty-nine thousand, forty".