6606615643 has 4 divisors (see below), whose sum is σ = 6620408640. Its totient is φ = 6592822648.

The previous prime is 6606615619. The next prime is 6606615707. The reversal of 6606615643 is 3465166066.

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 6606615643 - 2¹⁷ = 6606484571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6606615643.

It is not an unprimeable number, because it can be changed into a prime (6606618643) 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 3 ways as a sum of consecutive naturals, for example, 6895780 + ... + 6896737.

It is an arithmetic number, because the mean of its divisors is an integer number (1655102160).

Almost surely, 2^6606615643 is an apocalyptic number.

6606615643 is a deficient number, since it is larger than the sum of its proper divisors (13792997).

6606615643 is a wasteful number, since it uses less digits than its factorization.

6606615643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792996.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 6606615643 is about 81281.0903162599. The cubic root of 6606615643 is about 1876.4039871853.

The spelling of 6606615643 in words is "six billion, six hundred six million, six hundred fifteen thousand, six hundred forty-three".