166155511065717 has 8 divisors (see below), whose sum is σ = 234572486210496. Its totient is φ = 104254438315712.

The previous prime is 166155511065653. The next prime is 166155511065769. The reversal of 166155511065717 is 717560115551661.

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 166155511065717 - 2⁶ = 166155511065653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166155511065517) 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, 1628975598633 + ... + 1628975598734.

It is an arithmetic number, because the mean of its divisors is an integer number (29321560776312).

Almost surely, 2^{166155511065717} is an apocalyptic number.

166155511065717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166155511065717 is a deficient number, since it is larger than the sum of its proper divisors (68416975144779).

166155511065717 is a wasteful number, since it uses less digits than its factorization.

166155511065717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257951197387.

The product of its (nonzero) digits is 6615000, while the sum is 57.

The spelling of 166155511065717 in words is "one hundred sixty-six trillion, one hundred fifty-five billion, five hundred eleven million, sixty-five thousand, seven hundred seventeen".