163966684 has 24 divisors (see below), whose sum is σ = 336798560. Its totient is φ = 68371776.

The previous prime is 163966681. The next prime is 163966709. The reversal of 163966684 is 486669361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163966681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78099 + ... + 80170.

Almost surely, 2^163966684 is an apocalyptic number.

163966684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

163966684 is an abundant number, since it is smaller than the sum of its proper divisors (172831876).

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

163966684 is a wasteful number, since it uses less digits than its factorization.

163966684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158317 (or 158315 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 163966684 is about 12804.9476375345. The cubic root of 163966684 is about 547.3332995405. Note that the first 3 decimals are identical.

The spelling of 163966684 in words is "one hundred sixty-three million, nine hundred sixty-six thousand, six hundred eighty-four".