163321066 has 4 divisors (see below), whose sum is σ = 244981602. Its totient is φ = 81660532.

The previous prime is 163321049. The next prime is 163321097. The reversal of 163321066 is 660123361.

163321066 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, and also an emirpimes, since its reverse is a distinct semiprime: 660123361 = 6793 ⋅97177.

It can be written as a sum of positive squares in only one way, i.e., 163302841 + 18225 = 12779^2 + 135^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40830265 + ... + 40830268.

Almost surely, 2^163321066 is an apocalyptic number.

163321066 is a deficient number, since it is larger than the sum of its proper divisors (81660536).

163321066 is an equidigital number, since it uses as much as digits as its factorization.

163321066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81660535.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 163321066 is about 12779.7130640715. The cubic root of 163321066 is about 546.6139805626.

The spelling of 163321066 in words is "one hundred sixty-three million, three hundred twenty-one thousand, sixty-six".