166805905299 has 8 divisors (see below), whose sum is σ = 242626771392. Its totient is φ = 101094488040.

The previous prime is 166805905297. The next prime is 166805905319. The reversal of 166805905299 is 992509508661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166805905299 - 2¹ = 166805905297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166805905297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2527362169 + ... + 2527362234.

It is an arithmetic number, because the mean of its divisors is an integer number (30328346424).

Almost surely, 2^166805905299 is an apocalyptic number.

166805905299 is a deficient number, since it is larger than the sum of its proper divisors (75820866093).

166805905299 is a wasteful number, since it uses less digits than its factorization.

166805905299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054724417.

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 166805905299 in words is "one hundred sixty-six billion, eight hundred five million, nine hundred five thousand, two hundred ninety-nine".