6647561353 has 4 divisors (see below), whose sum is σ = 6861998848. Its totient is φ = 6433123860.

The previous prime is 6647561351. The next prime is 6647561359. The reversal of 6647561353 is 3531657466.

6647561353 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6647561353 - 2¹ = 6647561351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647561351) 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, 107218701 + ... + 107218762.

It is an arithmetic number, because the mean of its divisors is an integer number (1715499712).

Almost surely, 2^6647561353 is an apocalyptic number.

It is an amenable number.

6647561353 is a deficient number, since it is larger than the sum of its proper divisors (214437495).

6647561353 is a wasteful number, since it uses less digits than its factorization.

6647561353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214437494.

The product of its digits is 1360800, while the sum is 46.

The square root of 6647561353 is about 81532.5784763367. The cubic root of 6647561353 is about 1880.2724587201.

The spelling of 6647561353 in words is "six billion, six hundred forty-seven million, five hundred sixty-one thousand, three hundred fifty-three".