6221223660 has 96 divisors (see below), whose sum is σ = 18306554112. Its totient is φ = 1576592640.

The previous prime is 6221223643. The next prime is 6221223691. The reversal of 6221223660 is 663221226.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62875 + ... + 128045.

It is an arithmetic number, because the mean of its divisors is an integer number (190693272).

Almost surely, 2^6221223660 is an apocalyptic number.

6221223660 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 6221223660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9153277056).

6221223660 is an abundant number, since it is smaller than the sum of its proper divisors (12085330452).

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

6221223660 is a wasteful number, since it uses less digits than its factorization.

6221223660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65263 (or 65261 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 6221223660 is about 78874.7339773644. The cubic root of 6221223660 is about 1839.1843876525.

Adding to 6221223660 its reverse (663221226), we get a palindrome (6884444886).

The spelling of 6221223660 in words is "six billion, two hundred twenty-one million, two hundred twenty-three thousand, six hundred sixty".