1666282885902 has 192 divisors, whose sum is σ = 3905191180800. Its totient is φ = 511859761920.

The previous prime is 1666282885901. The next prime is 1666282885907. The reversal of 1666282885902 is 2095882826661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666282885902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666282885901) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1632010152 + ... + 1632011172.

It is an arithmetic number, because the mean of its divisors is an integer number (20339537400).

Almost surely, 2^{1666282885902} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666282885902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952595590400).

1666282885902 is an abundant number, since it is smaller than the sum of its proper divisors (2238908294898).

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

1666282885902 is a wasteful number, since it uses less digits than its factorization.

1666282885902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 1666282885902 in words is "one trillion, six hundred sixty-six billion, two hundred eighty-two million, eight hundred eighty-five thousand, nine hundred two".