165360016766881 has 8 divisors (see below), whose sum is σ = 167021057897064. Its totient is φ = 163699442563200.

The previous prime is 165360016766801. The next prime is 165360016766887. The reversal of 165360016766881 is 188667610063561.

It can be written as a sum of positive squares in 4 ways, for example, as 60317605806481 + 105042410960400 = 7766441^2 + 10249020^2 .

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 165360016766881 - 2³⁷ = 165222577813409 is a prime.

It is a super-2 number, since 2×165360016766881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165360016766887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116019756 + ... + 117436381.

It is an arithmetic number, because the mean of its divisors is an integer number (20877632237133).

Almost surely, 2^{165360016766881} is an apocalyptic number.

It is an amenable number.

165360016766881 is a deficient number, since it is larger than the sum of its proper divisors (1661041130183).

165360016766881 is a wasteful number, since it uses less digits than its factorization.

165360016766881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233463251.

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 165360016766881 in words is "one hundred sixty-five trillion, three hundred sixty billion, sixteen million, seven hundred sixty-six thousand, eight hundred eighty-one".