6626624 has 28 divisors (see below), whose sum is σ = 13435584. Its totient is φ = 3241344.

The previous prime is 6626623. The next prime is 6626639. The reversal of 6626624 is 4266266.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6626621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1907 + ... + 4109.

Almost surely, 2^6626624 is an apocalyptic number.

6626624 is a gapful number since it is divisible by the number (64) 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 6626624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6717792).

6626624 is an abundant number, since it is smaller than the sum of its proper divisors (6808960).

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

6626624 is a wasteful number, since it uses less digits than its factorization.

6626624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262 (or 2252 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 6626624 is about 2574.2229895640. Note that the first 3 decimals coincide. The cubic root of 6626624 is about 187.8296328926.

The spelling of 6626624 in words is "six million, six hundred twenty-six thousand, six hundred twenty-four".