166612166205265 has 32 divisors (see below), whose sum is σ = 222817210767360. Its totient is φ = 118559159582400.

The previous prime is 166612166205187. The next prime is 166612166205293. The reversal of 166612166205265 is 562502661216661.

It is not a de Polignac number, because 166612166205265 - 2¹⁵ = 166612166172497 is a prime.

It is a super-2 number, since 2×166612166205265² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845955 + ... + 18274024.

It is an arithmetic number, because the mean of its divisors is an integer number (6963037836480).

Almost surely, 2^{166612166205265} is an apocalyptic number.

It is an amenable number.

166612166205265 is a deficient number, since it is larger than the sum of its proper divisors (56205044562095).

166612166205265 is a wasteful number, since it uses less digits than its factorization.

166612166205265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19123413.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 166612166205265 in words is "one hundred sixty-six trillion, six hundred twelve billion, one hundred sixty-six million, two hundred five thousand, two hundred sixty-five".