6609856503 has 4 divisors (see below), whose sum is σ = 8813142008. Its totient is φ = 4406571000.

The previous prime is 6609856471. The next prime is 6609856531. The reversal of 6609856503 is 3056589066.

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

It is not a de Polignac number, because 6609856503 - 2⁵ = 6609856471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6609856543) 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, 1101642748 + ... + 1101642753.

It is an arithmetic number, because the mean of its divisors is an integer number (2203285502).

Almost surely, 2^6609856503 is an apocalyptic number.

6609856503 is a deficient number, since it is larger than the sum of its proper divisors (2203285505).

6609856503 is a wasteful number, since it uses less digits than its factorization.

6609856503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203285504.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 6609856503 is about 81301.0239972413. The cubic root of 6609856503 is about 1876.7107589052.

The spelling of 6609856503 in words is "six billion, six hundred nine million, eight hundred fifty-six thousand, five hundred three".