166225620366 has 128 divisors (see below), whose sum is σ = 413165383680. Its totient is φ = 49191753600.

The previous prime is 166225620299. The next prime is 166225620371. The reversal of 166225620366 is 663026522661.

166225620366 is a `hidden beast` number, since 1 + 6 + 6 + 22 + 562 + 0 + 3 + 66 = 666.

166225620366 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3523776 + ... + 3570636.

It is an arithmetic number, because the mean of its divisors is an integer number (3227854560).

Almost surely, 2^166225620366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166225620366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206582691840).

166225620366 is an abundant number, since it is smaller than the sum of its proper divisors (246939763314).

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

166225620366 is a wasteful number, since it uses less digits than its factorization.

166225620366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47079 (or 47073 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 166225620366 in words is "one hundred sixty-six billion, two hundred twenty-five million, six hundred twenty thousand, three hundred sixty-six".