6624661 has 8 divisors (see below), whose sum is σ = 6777344. Its totient is φ = 6473520.

The previous prime is 6624659. The next prime is 6624671. The reversal of 6624661 is 1664266.

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

It is a cyclic number.

It is not a de Polignac number, because 6624661 - 2¹ = 6624659 is a prime.

It is a super-2 number, since 2×6624661² = 87772266729842, which contains 22 as substring.

6624661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624641) 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 7 ways as a sum of consecutive naturals, for example, 13360 + ... + 13846.

It is an arithmetic number, because the mean of its divisors is an integer number (847168).

Almost surely, 2^6624661 is an apocalyptic number.

6624661 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6624661 is a deficient number, since it is larger than the sum of its proper divisors (152683).

6624661 is a wasteful number, since it uses less digits than its factorization.

6624661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its digits is 10368, while the sum is 31.

The square root of 6624661 is about 2573.8416812228. The cubic root of 6624661 is about 187.8110841825.

The spelling of 6624661 in words is "six million, six hundred twenty-four thousand, six hundred sixty-one".