8535717661 has 16 divisors (see below), whose sum is σ = 8938045440. Its totient is φ = 8141693040.

The previous prime is 8535717577. The next prime is 8535717677. The reversal of 8535717661 is 1667175358.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8535717661 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 (8535717361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581810 + ... + 1587196.

It is an arithmetic number, because the mean of its divisors is an integer number (558627840).

Almost surely, 2^8535717661 is an apocalyptic number.

It is an amenable number.

8535717661 is a deficient number, since it is larger than the sum of its proper divisors (402327779).

8535717661 is a wasteful number, since it uses less digits than its factorization.

8535717661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6144.

The product of its digits is 1058400, while the sum is 49.

The square root of 8535717661 is about 92388.9477210343. The cubic root of 8535717661 is about 2043.6821283237.

The spelling of 8535717661 in words is "eight billion, five hundred thirty-five million, seven hundred seventeen thousand, six hundred sixty-one".