161966130 has 32 divisors (see below), whose sum is σ = 389055744. Its totient is φ = 43153536.

The previous prime is 161966099. The next prime is 161966137. The reversal of 161966130 is 31669161.

It is a junction number, because it is equal to n+sod(n) for n = 161966091 and 161966100.

It is not an unprimeable number, because it can be changed into a prime (161966137) 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 15 ways as a sum of consecutive naturals, for example, 60582 + ... + 63198.

It is an arithmetic number, because the mean of its divisors is an integer number (12157992).

Almost surely, 2^161966130 is an apocalyptic number.

161966130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161966130 is an abundant number, since it is smaller than the sum of its proper divisors (227089614).

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

161966130 is a wasteful number, since it uses less digits than its factorization.

161966130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4690.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 161966130 is about 12726.5914525453. The cubic root of 161966130 is about 545.0981839211.

The spelling of 161966130 in words is "one hundred sixty-one million, nine hundred sixty-six thousand, one hundred thirty".