6327661 has 4 divisors (see below), whose sum is σ = 6383772. Its totient is φ = 6271552.

The previous prime is 6327649. The next prime is 6327707. The reversal of 6327661 is 1667236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 5317636 = 1005^2 + 2306^2 .

It is a cyclic number.

It is not a de Polignac number, because 6327661 - 2⁷ = 6327533 is a prime.

It is a Duffinian number.

6327661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6327611) 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 3 ways as a sum of consecutive naturals, for example, 27886 + ... + 28111.

It is an arithmetic number, because the mean of its divisors is an integer number (1595943).

Almost surely, 2^6327661 is an apocalyptic number.

It is an amenable number.

6327661 is a deficient number, since it is larger than the sum of its proper divisors (56111).

6327661 is a wasteful number, since it uses less digits than its factorization.

6327661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56110.

The product of its digits is 9072, while the sum is 31.

The square root of 6327661 is about 2515.4842476152. The cubic root of 6327661 is about 184.9613846844.

The spelling of 6327661 in words is "six million, three hundred twenty-seven thousand, six hundred sixty-one".