163839966 has 16 divisors (see below), whose sum is σ = 338979600. Its totient is φ = 52730048.

The previous prime is 163839941. The next prime is 163839967. The reversal of 163839966 is 669938361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163839967) 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, 470631 + ... + 470978.

It is an arithmetic number, because the mean of its divisors is an integer number (21186225).

Almost surely, 2^163839966 is an apocalyptic number.

163839966 is an abundant number, since it is smaller than the sum of its proper divisors (175139634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163839966 is a wasteful number, since it uses less digits than its factorization.

163839966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941643.

The product of its digits is 1259712, while the sum is 51.

The square root of 163839966 is about 12799.9986718749. The cubic root of 163839966 is about 547.1922650855.

The spelling of 163839966 in words is "one hundred sixty-three million, eight hundred thirty-nine thousand, nine hundred sixty-six".