163788660 has 144 divisors (see below), whose sum is σ = 577379712. Its totient is φ = 36806400.

The previous prime is 163788649. The next prime is 163788689. The reversal of 163788660 is 66887361.

163788660 is a `hidden beast` number, since 1 + 637 + 8 + 8 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75795 + ... + 77925.

Almost surely, 2^163788660 is an apocalyptic number.

163788660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163788660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288689856).

163788660 is an abundant number, since it is smaller than the sum of its proper divisors (413591052).

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

163788660 is a wasteful number, since it uses less digits than its factorization.

163788660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214 (or 2209 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 163788660 is about 12797.9943741197. The cubic root of 163788660 is about 547.1351419102.

The spelling of 163788660 in words is "one hundred sixty-three million, seven hundred eighty-eight thousand, six hundred sixty".