163356660 has 72 divisors (see below), whose sum is σ = 497001960. Its totient is φ = 43431168.

The previous prime is 163356647. The next prime is 163356667. The reversal of 163356660 is 66653361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1710864 + 161645796 = 1308^2 + 12714^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163356667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68854 + ... + 71186.

It is an arithmetic number, because the mean of its divisors is an integer number (6902805).

Almost surely, 2^163356660 is an apocalyptic number.

163356660 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 163356660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248500980).

163356660 is an abundant number, since it is smaller than the sum of its proper divisors (333645300).

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

163356660 is a wasteful number, since it uses less digits than its factorization.

163356660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 163356660 is about 12781.1055859812. The cubic root of 163356660 is about 546.6536871464.

The spelling of 163356660 in words is "one hundred sixty-three million, three hundred fifty-six thousand, six hundred sixty".