6621912 has 80 divisors (see below), whose sum is σ = 20255400. Its totient is φ = 2004480.

The previous prime is 6621911. The next prime is 6621929. The reversal of 6621912 is 2191266.

6621912 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621911) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6664 + ... + 7592.

Almost surely, 2^6621912 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 6621912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10127700).

6621912 is an abundant number, since it is smaller than the sum of its proper divisors (13633488).

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

6621912 is a wasteful number, since it uses less digits than its factorization.

6621912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 945 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 6621912 is about 2573.3075991805. The cubic root of 6621912 is about 187.7851022693.

The spelling of 6621912 in words is "six million, six hundred twenty-one thousand, nine hundred twelve".