166620116286 has 128 divisors (see below), whose sum is σ = 418884480000. Its totient is φ = 48708874368.

The previous prime is 166620116281. The next prime is 166620116317. The reversal of 166620116286 is 682611026661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166620116281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2371125 + ... + 2440383.

It is an arithmetic number, because the mean of its divisors is an integer number (3272535000).

Almost surely, 2^166620116286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166620116286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209442240000).

166620116286 is an abundant number, since it is smaller than the sum of its proper divisors (252264363714).

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

166620116286 is a wasteful number, since it uses less digits than its factorization.

166620116286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69455 (or 69449 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 166620116286 in words is "one hundred sixty-six billion, six hundred twenty million, one hundred sixteen thousand, two hundred eighty-six".