6626620 has 96 divisors (see below), whose sum is σ = 18740736. Its totient is φ = 1900800.

The previous prime is 6626603. The next prime is 6626621. The reversal of 6626620 is 266266.

6626620 is a nontrivial binomial coefficient, being equal to C(3641, 2).

It is a Harshad number since it is a multiple of its sum of digits (28).

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 31 ways as a sum of consecutive naturals, for example, 19855 + ... + 20185.

It is an arithmetic number, because the mean of its divisors is an integer number (195216).

Almost surely, 2^6626620 is an apocalyptic number.

6626620 is the 3640-th triangular number.

6626620 is the 1214-th centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6626620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9370368).

6626620 is an abundant number, since it is smaller than the sum of its proper divisors (12114116).

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

6626620 is a wasteful number, since it uses less digits than its factorization.

6626620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 6626620 is about 2574.2222126304. Note that the first 4 decimals coincide. The cubic root of 6626620 is about 187.8295950997.

It can be divided in two parts, 6 and 626620, that added together give a palindrome (626626).

The spelling of 6626620 in words is "six million, six hundred twenty-six thousand, six hundred twenty".