166565015161051 has 16 divisors (see below), whose sum is σ = 181162950702048. Its totient is φ = 152222269248000.

The previous prime is 166565015161043. The next prime is 166565015161093. The reversal of 166565015161051 is 150161510565661.

It is a cyclic number.

It is not a de Polignac number, because 166565015161051 - 2³ = 166565015161043 is a prime.

It is a super-2 number, since 2×166565015161051² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166565015160986 and 166565015161004.

It is not an unprimeable number, because it can be changed into a prime (166565015161451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22641916 + ... + 29082406.

It is an arithmetic number, because the mean of its divisors is an integer number (11322684418878).

Almost surely, 2^{166565015161051} is an apocalyptic number.

166565015161051 is a deficient number, since it is larger than the sum of its proper divisors (14597935540997).

166565015161051 is a wasteful number, since it uses less digits than its factorization.

166565015161051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460302.

The product of its (nonzero) digits is 810000, while the sum is 49.

The spelling of 166565015161051 in words is "one hundred sixty-six trillion, five hundred sixty-five billion, fifteen million, one hundred sixty-one thousand, fifty-one".