6613643 has 4 divisors (see below), whose sum is σ = 6697440. Its totient is φ = 6529848.

The previous prime is 6613631. The next prime is 6613753. The reversal of 6613643 is 3463166.

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

It is a cyclic number.

It is not a de Polignac number, because 6613643 - 2¹⁶ = 6548107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6613603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41780 + ... + 41937.

It is an arithmetic number, because the mean of its divisors is an integer number (1674360).

Almost surely, 2^6613643 is an apocalyptic number.

6613643 is a deficient number, since it is larger than the sum of its proper divisors (83797).

6613643 is an equidigital number, since it uses as much as digits as its factorization.

6613643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83796.

The product of its digits is 7776, while the sum is 29.

The square root of 6613643 is about 2571.7004102344. The cubic root of 6613643 is about 187.7069052269.

The spelling of 6613643 in words is "six million, six hundred thirteen thousand, six hundred forty-three".