161065672 has 16 divisors (see below), whose sum is σ = 303924060. Its totient is φ = 80019264.

The previous prime is 161065669. The next prime is 161065673. The reversal of 161065672 is 276560161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 148206276 + 12859396 = 12174^2 + 3586^2 .

It is a super-3 number, since 3×161065672³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161065673) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 62863 + ... + 65374.

Almost surely, 2^161065672 is an apocalyptic number.

It is an amenable number.

161065672 is a deficient number, since it is larger than the sum of its proper divisors (142858388).

161065672 is a wasteful number, since it uses less digits than its factorization.

161065672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128400 (or 128396 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 161065672 is about 12691.1651159379. The cubic root of 161065672 is about 544.0861401223.

The spelling of 161065672 in words is "one hundred sixty-one million, sixty-five thousand, six hundred seventy-two".