6705551561 has 8 divisors (see below), whose sum is σ = 6747720000. Its totient is φ = 6663468240.

The previous prime is 6705551533. The next prime is 6705551563. The reversal of 6705551561 is 1651555076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6705551561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6705551563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140615 + ... + 182163.

It is an arithmetic number, because the mean of its divisors is an integer number (843465000).

Almost surely, 2^6705551561 is an apocalyptic number.

It is an amenable number.

6705551561 is a deficient number, since it is larger than the sum of its proper divisors (42168439).

6705551561 is a wasteful number, since it uses less digits than its factorization.

6705551561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42559.

The product of its (nonzero) digits is 157500, while the sum is 41.

The square root of 6705551561 is about 81887.4322530631. The cubic root of 6705551561 is about 1885.7241749839.

The spelling of 6705551561 in words is "six billion, seven hundred five million, five hundred fifty-one thousand, five hundred sixty-one".