8736543661 has 8 divisors (see below), whose sum is σ = 9252999360. Its totient is φ = 8220370368.

The previous prime is 8736543643. The next prime is 8736543667. The reversal of 8736543661 is 1663456378.

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 8736543661 - 2⁹ = 8736543149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8736543667) 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, 5161 + ... + 132286.

It is an arithmetic number, because the mean of its divisors is an integer number (1156624920).

Almost surely, 2^8736543661 is an apocalyptic number.

It is an amenable number.

8736543661 is a deficient number, since it is larger than the sum of its proper divisors (516455699).

8736543661 is a wasteful number, since it uses less digits than its factorization.

8736543661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141203.

The product of its digits is 2177280, while the sum is 49.

The square root of 8736543661 is about 93469.4798370035. The cubic root of 8736543661 is about 2059.5857762826.

The spelling of 8736543661 in words is "eight billion, seven hundred thirty-six million, five hundred forty-three thousand, six hundred sixty-one".