3886523665 has 4 divisors (see below), whose sum is σ = 4663828404. Its totient is φ = 3109218928.

The previous prime is 3886523569. The next prime is 3886523677. The reversal of 3886523665 is 5663256883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5663256883 = 257 ⋅22036019.

It can be written as a sum of positive squares in 2 ways, for example, as 2047743504 + 1838780161 = 45252^2 + 42881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3886523665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 388652362 + ... + 388652371.

It is an arithmetic number, because the mean of its divisors is an integer number (1165957101).

Almost surely, 2^3886523665 is an apocalyptic number.

It is an amenable number.

3886523665 is a deficient number, since it is larger than the sum of its proper divisors (777304739).

3886523665 is an equidigital number, since it uses as much as digits as its factorization.

3886523665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777304738.

The product of its digits is 6220800, while the sum is 52.

The square root of 3886523665 is about 62341.9895816616. The cubic root of 3886523665 is about 1572.2457839498.

The spelling of 3886523665 in words is "three billion, eight hundred eighty-six million, five hundred twenty-three thousand, six hundred sixty-five".