6624047661 has 32 divisors (see below), whose sum is σ = 11175779328. Its totient is φ = 3389696640.

The previous prime is 6624047657. The next prime is 6624047669. The reversal of 6624047661 is 1667404266.

It is a happy number.

It is not a de Polignac number, because 6624047661 - 2² = 6624047657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624047669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198520 + ... + 229473.

It is an arithmetic number, because the mean of its divisors is an integer number (349243104).

Almost surely, 2^6624047661 is an apocalyptic number.

It is an amenable number.

6624047661 is a deficient number, since it is larger than the sum of its proper divisors (4551731667).

6624047661 is a wasteful number, since it uses less digits than its factorization.

6624047661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428081.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 6624047661 is about 81388.2525982712. The cubic root of 6624047661 is about 1878.0528789007.

The spelling of 6624047661 in words is "six billion, six hundred twenty-four million, forty-seven thousand, six hundred sixty-one".