3871665654165 has 24 divisors (see below), whose sum is σ = 7064091721440. Its totient is φ = 1956210014304.

The previous prime is 3871665654139. The next prime is 3871665654191. The reversal of 3871665654165 is 5614565661783.

3871665654165 is a `hidden beast` number, since 3 + 8 + 7 + 1 + 6 + 6 + 565 + 4 + 1 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (3871665654139) and next prime (3871665654191).

It is not a de Polignac number, because 3871665654165 - 2⁸ = 3871665653909 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2264131107 + ... + 2264132816.

It is an arithmetic number, because the mean of its divisors is an integer number (294337155060).

Almost surely, 2^{3871665654165} is an apocalyptic number.

It is an amenable number.

3871665654165 is a deficient number, since it is larger than the sum of its proper divisors (3192426067275).

3871665654165 is a wasteful number, since it uses less digits than its factorization.

3871665654165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528263953 (or 4528263950 counting only the distinct ones).

The product of its digits is 108864000, while the sum is 63.

The spelling of 3871665654165 in words is "three trillion, eight hundred seventy-one billion, six hundred sixty-five million, six hundred fifty-four thousand, one hundred sixty-five".