161668041 has 8 divisors (see below), whose sum is σ = 215886144. Its totient is φ = 107614320.

The previous prime is 161668033. The next prime is 161668051. The reversal of 161668041 is 140866161.

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

It is not a de Polignac number, because 161668041 - 2³ = 161668033 is a prime.

It is a super-2 number, since 2×161668041² = 52273110961555362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161667993 and 161668011.

It is not an unprimeable number, because it can be changed into a prime (161668021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38781 + ... + 42746.

It is an arithmetic number, because the mean of its divisors is an integer number (26985768).

Almost surely, 2^161668041 is an apocalyptic number.

It is an amenable number.

161668041 is a deficient number, since it is larger than the sum of its proper divisors (54218103).

161668041 is an equidigital number, since it uses as much as digits as its factorization.

161668041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82191.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 161668041 is about 12714.8747929345. The cubic root of 161668041 is about 544.7635716628.

The spelling of 161668041 in words is "one hundred sixty-one million, six hundred sixty-eight thousand, forty-one".