161662146 has 32 divisors (see below), whose sum is σ = 360365760. Its totient is φ = 48047616.

The previous prime is 161662087. The next prime is 161662159. The reversal of 161662146 is 641266161.

It is a happy number.

It is a super-2 number, since 2×161662146² = 52269298898650632, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39771 + ... + 43646.

It is an arithmetic number, because the mean of its divisors is an integer number (11261430).

Almost surely, 2^161662146 is an apocalyptic number.

161662146 is an abundant number, since it is smaller than the sum of its proper divisors (198703614).

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

161662146 is a wasteful number, since it uses less digits than its factorization.

161662146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83458.

The product of its digits is 10368, while the sum is 33.

The square root of 161662146 is about 12714.6429757190. The cubic root of 161662146 is about 544.7569502339.

The spelling of 161662146 in words is "one hundred sixty-one million, six hundred sixty-two thousand, one hundred forty-six".