8106645661 has 8 divisors (see below), whose sum is σ = 8152731648. Its totient is φ = 8060598000.

The previous prime is 8106645641. The next prime is 8106645671. The reversal of 8106645661 is 1665466018.

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 8106645661 - 2⁹ = 8106645149 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 (8106645611) 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 7 ways as a sum of consecutive naturals, for example, 486691 + ... + 503071.

It is an arithmetic number, because the mean of its divisors is an integer number (1019091456).

Almost surely, 2^8106645661 is an apocalyptic number.

It is an amenable number.

8106645661 is a deficient number, since it is larger than the sum of its proper divisors (46085987).

8106645661 is a wasteful number, since it uses less digits than its factorization.

8106645661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19163.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 8106645661 is about 90036.9127691526. The cubic root of 8106645661 is about 2008.8479376935.

The spelling of 8106645661 in words is "eight billion, one hundred six million, six hundred forty-five thousand, six hundred sixty-one".