161754066771663 has 8 divisors (see below), whose sum is σ = 215674196907568. Its totient is φ = 107834990575104.

The previous prime is 161754066771617. The next prime is 161754066771691. The reversal of 161754066771663 is 366177660457161.

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

It is not a de Polignac number, because 161754066771663 - 2³⁰ = 161752993029839 is a prime.

It is a super-2 number, since 2×161754066771663² (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 = 161754066771594 and 161754066771603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161754066772663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263126656 + ... + 263740677.

It is an arithmetic number, because the mean of its divisors is an integer number (26959274613446).

Almost surely, 2^{161754066771663} is an apocalyptic number.

161754066771663 is a deficient number, since it is larger than the sum of its proper divisors (53920130135905).

161754066771663 is a wasteful number, since it uses less digits than its factorization.

161754066771663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526969673.

The product of its (nonzero) digits is 160030080, while the sum is 66.

The spelling of 161754066771663 in words is "one hundred sixty-one trillion, seven hundred fifty-four billion, sixty-six million, seven hundred seventy-one thousand, six hundred sixty-three".