161663339 has 4 divisors (see below), whose sum is σ = 161722224. Its totient is φ = 161604456.

The previous prime is 161663329. The next prime is 161663399. The reversal of 161663339 is 933366161.

161663339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161663339 - 2⁸ = 161663083 is a prime.

It is a super-2 number, since 2×161663339² = 52270070353257842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161663329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25112 + ... + 30885.

It is an arithmetic number, because the mean of its divisors is an integer number (40430556).

Almost surely, 2^161663339 is an apocalyptic number.

161663339 is a deficient number, since it is larger than the sum of its proper divisors (58885).

161663339 is an equidigital number, since it uses as much as digits as its factorization.

161663339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58884.

The product of its digits is 52488, while the sum is 38.

The square root of 161663339 is about 12714.6898900445. The cubic root of 161663339 is about 544.7582902579.

The spelling of 161663339 in words is "one hundred sixty-one million, six hundred sixty-three thousand, three hundred thirty-nine".