166134663665205 has 32 divisors (see below), whose sum is σ = 270554025996288. Its totient is φ = 87034842619200.

The previous prime is 166134663665167. The next prime is 166134663665207. The reversal of 166134663665205 is 502566366431661.

It is not a de Polignac number, because 166134663665205 - 2⁶ = 166134663665141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166134663665207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287525019 + ... + 288102248.

It is an arithmetic number, because the mean of its divisors is an integer number (8454813312384).

Almost surely, 2^{166134663665205} is an apocalyptic number.

166134663665205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166134663665205 is a deficient number, since it is larger than the sum of its proper divisors (104419362331083).

166134663665205 is a wasteful number, since it uses less digits than its factorization.

166134663665205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575627617.

The product of its (nonzero) digits is 83980800, while the sum is 60.

The spelling of 166134663665205 in words is "one hundred sixty-six trillion, one hundred thirty-four billion, six hundred sixty-three million, six hundred sixty-five thousand, two hundred five".