8194085661 has 16 divisors (see below), whose sum is σ = 11097469440. Its totient is φ = 5377339200.

The previous prime is 8194085659. The next prime is 8194085671. The reversal of 8194085661 is 1665804918.

It is not a de Polignac number, because 8194085661 - 2¹ = 8194085659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8194085661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8194085621) 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 15 ways as a sum of consecutive naturals, for example, 25741 + ... + 130578.

It is an arithmetic number, because the mean of its divisors is an integer number (693591840).

Almost surely, 2^8194085661 is an apocalyptic number.

It is an amenable number.

8194085661 is a deficient number, since it is larger than the sum of its proper divisors (2903383779).

8194085661 is a wasteful number, since it uses less digits than its factorization.

8194085661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156596.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 8194085661 is about 90521.1890167159. The cubic root of 8194085661 is about 2016.0447439738.

The spelling of 8194085661 in words is "eight billion, one hundred ninety-four million, eighty-five thousand, six hundred sixty-one".