166563262166165 has 8 divisors (see below), whose sum is σ = 199878068782680. Its totient is φ = 133249173610752.

The previous prime is 166563262166143. The next prime is 166563262166183. The reversal of 166563262166165 is 561661262365661.

It can be written as a sum of positive squares in 4 ways, for example, as 8909950382116 + 157653311784049 = 2984954^2 + 12556007^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 166563262166165 - 2³⁰ = 166562188424341 is a prime.

It is a super-2 number, since 2×166563262166165² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166563262166098 and 166563262166107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179004824 + ... + 179932913.

It is an arithmetic number, because the mean of its divisors is an integer number (24984758597835).

Almost surely, 2^{166563262166165} is an apocalyptic number.

It is an amenable number.

166563262166165 is a deficient number, since it is larger than the sum of its proper divisors (33314806616515).

166563262166165 is an equidigital number, since it uses as much as digits as its factorization.

166563262166165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359030551.

The product of its digits is 83980800, while the sum is 62.

The spelling of 166563262166165 in words is "one hundred sixty-six trillion, five hundred sixty-three billion, two hundred sixty-two million, one hundred sixty-six thousand, one hundred sixty-five".