6620416 has 36 divisors (see below), whose sum is σ = 14422464. Its totient is φ = 3008000.

The previous prime is 6620407. The next prime is 6620423. The reversal of 6620416 is 6140266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (400624).

Almost surely, 2^6620416 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 6620416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7211232).

6620416 is an abundant number, since it is smaller than the sum of its proper divisors (7802048).

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

6620416 is a wasteful number, since it uses less digits than its factorization.

6620416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 6620416 is about 2573.0169062795. The cubic root of 6620416 is about 187.7709599455.

The spelling of 6620416 in words is "six million, six hundred twenty thousand, four hundred sixteen".