662220 has 72 divisors (see below), whose sum is σ = 2170896. Its totient is φ = 162432.

The previous prime is 662203. The next prime is 662227. The reversal of 662220 is 22266.

662220 is a `hidden beast` number, since 662 + 2 + 2 + 0 = 666.

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

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 662193 and 662202.

It is not an unprimeable number, because it can be changed into a prime (662227) 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, 2199 + ... + 2481.

2⁶⁶²²²⁰ is an apocalyptic number.

662220 is a gapful number since it is divisible by the number (60) 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 662220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085448).

662220 is an abundant number, since it is smaller than the sum of its proper divisors (1508676).

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

662220 is a wasteful number, since it uses less digits than its factorization.

662220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 662220 is about 813.7690089946. The cubic root of 662220 is about 87.1633869804.

Adding to 662220 its reverse (22266), we get a palindrome (684486).

It can be divided in two parts, 6 and 62220, that added together give a palindrome (62226).

The spelling of 662220 in words is "six hundred sixty-two thousand, two hundred twenty".