3865866754865 has 16 divisors (see below), whose sum is σ = 4842716087808. Its totient is φ = 2957019337536.

The previous prime is 3865866754861. The next prime is 3865866754889. The reversal of 3865866754865 is 5684576685683.

3865866754865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3865866754865 - 2² = 3865866754861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865866754861) 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, 6587462 + ... + 7150271.

It is an arithmetic number, because the mean of its divisors is an integer number (302669755488).

Almost surely, 2^{3865866754865} is an apocalyptic number.

It is an amenable number.

3865866754865 is a deficient number, since it is larger than the sum of its proper divisors (976849332943).

3865866754865 is a wasteful number, since it uses less digits than its factorization.

3865866754865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13740208.

The product of its digits is 6967296000, while the sum is 77.

The spelling of 3865866754865 in words is "three trillion, eight hundred sixty-five billion, eight hundred sixty-six million, seven hundred fifty-four thousand, eight hundred sixty-five".