165166818485 has 8 divisors (see below), whose sum is σ = 209859016536. Its totient is φ = 124360898560.

The previous prime is 165166818463. The next prime is 165166818503. The reversal of 165166818485 is 584818661561.

It can be written as a sum of positive squares in 4 ways, for example, as 74388744049 + 90778074436 = 272743^2 + 301294^2 .

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

It is not a de Polignac number, because 165166818485 - 2¹⁰ = 165166817461 is a prime.

It is a super-3 number, since 3×165166818485³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971569436 + ... + 971569605.

It is an arithmetic number, because the mean of its divisors is an integer number (26232377067).

Almost surely, 2^165166818485 is an apocalyptic number.

It is an amenable number.

165166818485 is a deficient number, since it is larger than the sum of its proper divisors (44692198051).

165166818485 is a wasteful number, since it uses less digits than its factorization.

165166818485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943139063.

The product of its digits is 11059200, while the sum is 59.

The spelling of 165166818485 in words is "one hundred sixty-five billion, one hundred sixty-six million, eight hundred eighteen thousand, four hundred eighty-five".