6622561 has 8 divisors (see below), whose sum is σ = 7458048. Its totient is φ = 5826000.

The previous prime is 6622547. The next prime is 6622601. The reversal of 6622561 is 1652266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6622561 is a prime.

It is a Duffinian number.

6622561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6622501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9370 + ... + 10051.

It is an arithmetic number, because the mean of its divisors is an integer number (932256).

Almost surely, 2^6622561 is an apocalyptic number.

It is an amenable number.

6622561 is a deficient number, since it is larger than the sum of its proper divisors (835487).

6622561 is a wasteful number, since it uses less digits than its factorization.

6622561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19463.

The product of its digits is 4320, while the sum is 28.

The square root of 6622561 is about 2573.4336983882. The cubic root of 6622561 is about 187.7912368797.

It can be divided in two parts, 662 and 2561, that added together give a palindrome (3223).

The spelling of 6622561 in words is "six million, six hundred twenty-two thousand, five hundred sixty-one".