6220656 has 60 divisors (see below), whose sum is σ = 18754008. Its totient is φ = 1913472.

The previous prime is 6220651. The next prime is 6220661. The reversal of 6220656 is 6560226.

6220656 is a `hidden beast` number, since 6 + 2 + 2 + 0 + 656 = 666.

It is an interprime number because it is at equal distance from previous prime (6220651) and next prime (6220661).

It is a super-2 number, since 2×6220656² = 77393122140672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6220651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211 + ... + 3533.

Almost surely, 2^6220656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6220656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9377004).

6220656 is an abundant number, since it is smaller than the sum of its proper divisors (12533352).

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

6220656 is a wasteful number, since it uses less digits than its factorization.

6220656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3341 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6220656 is about 2494.1242952187. The cubic root of 6220656 is about 183.9128446720.

The spelling of 6220656 in words is "six million, two hundred twenty thousand, six hundred fifty-six".