163345666 has 16 divisors (see below), whose sum is σ = 267493248. Its totient is φ = 74192400.

The previous prime is 163345657. The next prime is 163345667. The reversal of 163345666 is 666543361.

It is not an unprimeable number, because it can be changed into a prime (163345667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47191 + ... + 50533.

It is an arithmetic number, because the mean of its divisors is an integer number (16718328).

Almost surely, 2^163345666 is an apocalyptic number.

163345666 is a deficient number, since it is larger than the sum of its proper divisors (104147582).

163345666 is a wasteful number, since it uses less digits than its factorization.

163345666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577.

The product of its digits is 233280, while the sum is 40.

The square root of 163345666 is about 12780.6754907556. The cubic root of 163345666 is about 546.6414234989.

It can be divided in two parts, 1633 and 45666, that multiplied together give a triangular number (74572578 = T₁₂₂₁₂).

The spelling of 163345666 in words is "one hundred sixty-three million, three hundred forty-five thousand, six hundred sixty-six".