6622641 has 10 divisors (see below), whose sum is σ = 9893202. Its totient is φ = 4415040.

The previous prime is 6622631. The next prime is 6622661. The reversal of 6622641 is 1462266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5475600 + 1147041 = 2340^2 + 1071^2 .

It is not a de Polignac number, because 6622641 - 2¹³ = 6614449 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (6622601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40800 + ... + 40961.

Almost surely, 2^6622641 is an apocalyptic number.

It is an amenable number.

6622641 is a deficient number, since it is larger than the sum of its proper divisors (3270561).

6622641 is an equidigital number, since it uses as much as digits as its factorization.

6622641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81773 (or 81764 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 6622641 is about 2573.4492417765. The cubic root of 6622641 is about 187.7919930443.

The spelling of 6622641 in words is "six million, six hundred twenty-two thousand, six hundred forty-one".