161663033 has 8 divisors (see below), whose sum is σ = 188689152. Its totient is φ = 135619776.

The previous prime is 161663011. The next prime is 161663053. The reversal of 161663033 is 330366161.

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

It is a cyclic number.

It is not a de Polignac number, because 161663033 - 2¹⁶ = 161597497 is a prime.

It is a super-2 number, since 2×161663033² = 52269872477518178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161662987 and 161663005.

It is not an unprimeable number, because it can be changed into a prime (161663003) 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, 245360 + ... + 246017.

It is an arithmetic number, because the mean of its divisors is an integer number (23586144).

Almost surely, 2^161663033 is an apocalyptic number.

It is an amenable number.

161663033 is a deficient number, since it is larger than the sum of its proper divisors (27026119).

161663033 is an equidigital number, since it uses as much as digits as its factorization.

161663033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491431.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 161663033 is about 12714.6778567135. The cubic root of 161663033 is about 544.7579465474.

The spelling of 161663033 in words is "one hundred sixty-one million, six hundred sixty-three thousand, thirty-three".