3866738865 has 16 divisors (see below), whose sum is σ = 6749217216. Its totient is φ = 1874782400.

The previous prime is 3866738857. The next prime is 3866738879. The reversal of 3866738865 is 5688376683.

It is a happy number.

3866738865 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3866738865 - 2³ = 3866738857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3866738799 and 3866738808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11717226 + ... + 11717555.

It is an arithmetic number, because the mean of its divisors is an integer number (421826076).

Almost surely, 2^3866738865 is an apocalyptic number.

It is an amenable number.

3866738865 is a deficient number, since it is larger than the sum of its proper divisors (2882478351).

3866738865 is a wasteful number, since it uses less digits than its factorization.

3866738865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23434800.

The product of its digits is 34836480, while the sum is 60.

The square root of 3866738865 is about 62183.1075534184. The cubic root of 3866738865 is about 1569.5733441102.

The spelling of 3866738865 in words is "three billion, eight hundred sixty-six million, seven hundred thirty-eight thousand, eight hundred sixty-five".