3865014666218 has 4 divisors (see below), whose sum is σ = 5797521999330. Its totient is φ = 1932507333108.

The previous prime is 3865014666217. The next prime is 3865014666257. The reversal of 3865014666218 is 8126664105683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2227953272689 + 1637061393529 = 1492633^2 + 1279477^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3865014666211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966253666553 + ... + 966253666556.

Almost surely, 2^{3865014666218} is an apocalyptic number.

3865014666218 is a deficient number, since it is larger than the sum of its proper divisors (1932507333112).

3865014666218 is a wasteful number, since it uses less digits than its factorization.

3865014666218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932507333111.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 3865014666218 in words is "three trillion, eight hundred sixty-five billion, fourteen million, six hundred sixty-six thousand, two hundred eighteen".