8387327661 has 4 divisors (see below), whose sum is σ = 11183103552. Its totient is φ = 5591551772.

The previous prime is 8387327659. The next prime is 8387327671. The reversal of 8387327661 is 1667237838.

8387327661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8387327661 - 2¹ = 8387327659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8387327651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397887941 + ... + 1397887946.

It is an arithmetic number, because the mean of its divisors is an integer number (2795775888).

Almost surely, 2^8387327661 is an apocalyptic number.

It is an amenable number.

8387327661 is a deficient number, since it is larger than the sum of its proper divisors (2795775891).

8387327661 is a wasteful number, since it uses less digits than its factorization.

8387327661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795775890.

The product of its digits is 2032128, while the sum is 51.

The square root of 8387327661 is about 91582.3545285881. The cubic root of 8387327661 is about 2031.7699674663.

The spelling of 8387327661 in words is "eight billion, three hundred eighty-seven million, three hundred twenty-seven thousand, six hundred sixty-one".