161660101169 has 8 divisors (see below), whose sum is σ = 186481078848. Its totient is φ = 137270792880.

The previous prime is 161660101133. The next prime is 161660101199. The reversal of 161660101169 is 961101066161.

It is a happy number.

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 161660101169 - 2¹⁶ = 161660035633 is a prime.

It is a super-2 number, since 2×161660101169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161660101199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107916542 + ... + 107918039.

It is an arithmetic number, because the mean of its divisors is an integer number (23310134856).

Almost surely, 2^161660101169 is an apocalyptic number.

It is an amenable number.

161660101169 is a deficient number, since it is larger than the sum of its proper divisors (24820977679).

161660101169 is a wasteful number, since it uses less digits than its factorization.

161660101169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215834695.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 161660101169 in words is "one hundred sixty-one billion, six hundred sixty million, one hundred one thousand, one hundred sixty-nine".