2210665172166 has 64 divisors (see below), whose sum is σ = 5364958406400. Its totient is φ = 669177273600.

The previous prime is 2210665172147. The next prime is 2210665172179. The reversal of 2210665172166 is 6612715660122.

2210665172166 is a `hidden beast` number, since 2 + 2 + 10 + 66 + 517 + 2 + 1 + 66 = 666.

It is a super-2 number, since 2×2210665172166² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1451220 + ... + 2554871.

It is an arithmetic number, because the mean of its divisors is an integer number (83827475100).

Almost surely, 2^{2210665172166} is an apocalyptic number.

2210665172166 is an abundant number, since it is smaller than the sum of its proper divisors (3154293234234).

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

2210665172166 is a wasteful number, since it uses less digits than its factorization.

2210665172166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007042 (or 4007036 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 2210665172166 in words is "two trillion, two hundred ten billion, six hundred sixty-five million, one hundred seventy-two thousand, one hundred sixty-six".