161066116616 has 32 divisors (see below), whose sum is σ = 320785307640. Its totient is φ = 75553640448.

The previous prime is 161066116579. The next prime is 161066116621. The reversal of 161066116616 is 616611660161.

It can be written as a sum of positive squares in 4 ways, for example, as 73574392516 + 87491724100 = 271246^2 + 295790^2 .

It is a super-2 number, since 2×161066116616² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1849301 + ... + 1934436.

Almost surely, 2^161066116616 is an apocalyptic number.

It is an amenable number.

161066116616 is a deficient number, since it is larger than the sum of its proper divisors (159719191024).

161066116616 is a wasteful number, since it uses less digits than its factorization.

161066116616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784073 (or 3784069 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

Adding to 161066116616 its reverse (616611660161), we get a palindrome (777677776777).

The spelling of 161066116616 in words is "one hundred sixty-one billion, sixty-six million, one hundred sixteen thousand, six hundred sixteen".