163566020 has 24 divisors (see below), whose sum is σ = 343803264. Its totient is φ = 65366496.

The previous prime is 163566019. The next prime is 163566059. The reversal of 163566020 is 20665361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23459 + ... + 29621.

It is an arithmetic number, because the mean of its divisors is an integer number (14325136).

Almost surely, 2^163566020 is an apocalyptic number.

163566020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163566020 is an abundant number, since it is smaller than the sum of its proper divisors (180237244).

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

163566020 is a wasteful number, since it uses less digits than its factorization.

163566020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499 (or 7497 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 163566020 is about 12789.2931782800. The cubic root of 163566020 is about 546.8871202538.

The spelling of 163566020 in words is "one hundred sixty-three million, five hundred sixty-six thousand, twenty".