161665253346 has 8 divisors (see below), whose sum is σ = 323330506704. Its totient is φ = 53888417780.

The previous prime is 161665253261. The next prime is 161665253359. The reversal of 161665253346 is 643352566161.

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

161665253346 is an admirable number.

It is a super-2 number, since 2×161665253346² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161665253295 and 161665253304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13472104440 + ... + 13472104451.

It is an arithmetic number, because the mean of its divisors is an integer number (40416313338).

Almost surely, 2^161665253346 is an apocalyptic number.

161665253346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161665253346 is a wasteful number, since it uses less digits than its factorization.

161665253346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26944208896.

The product of its digits is 2332800, while the sum is 48.

The spelling of 161665253346 in words is "one hundred sixty-one billion, six hundred sixty-five million, two hundred fifty-three thousand, three hundred forty-six".