6610105561 has 8 divisors (see below), whose sum is σ = 6686668800. Its totient is φ = 6533593440.

The previous prime is 6610105559. The next prime is 6610105571. The reversal of 6610105561 is 1655010166.

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

It is a cyclic number.

It is not a de Polignac number, because 6610105561 - 2¹ = 6610105559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6610105571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287896 + ... + 310006.

It is an arithmetic number, because the mean of its divisors is an integer number (835833600).

Almost surely, 2^6610105561 is an apocalyptic number.

It is an amenable number.

6610105561 is a deficient number, since it is larger than the sum of its proper divisors (76563239).

6610105561 is a wasteful number, since it uses less digits than its factorization.

6610105561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25559.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 6610105561 is about 81302.5556855380. Note that the first 3 decimals coincide. The cubic root of 6610105561 is about 1876.7343299644.

The spelling of 6610105561 in words is "six billion, six hundred ten million, one hundred five thousand, five hundred sixty-one".