11660220 has 192 divisors, whose sum is σ = 42900480. Its totient is φ = 2592000.

The previous prime is 11660219. The next prime is 11660221. The reversal of 11660220 is 2206611.

It is a happy number.

11660220 is a `hidden beast` number, since 1 + 1 + 660 + 2 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (11660219) and next prime (11660221).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11660193 and 11660202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 77145 + ... + 77295.

It is an arithmetic number, because the mean of its divisors is an integer number (223440).

Almost surely, 2^11660220 is an apocalyptic number.

11660220 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 11660220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21450240).

11660220 is an abundant number, since it is smaller than the sum of its proper divisors (31240260).

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

11660220 is a wasteful number, since it uses less digits than its factorization.

11660220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11660220 is about 3414.7064295485. The cubic root of 11660220 is about 226.7612878693.

Adding to 11660220 its reverse (2206611), we get a palindrome (13866831).

The spelling of 11660220 in words is "eleven million, six hundred sixty thousand, two hundred twenty".