3686666866835 has 4 divisors (see below), whose sum is σ = 4424000240208. Its totient is φ = 2949333493464.

The previous prime is 3686666866823. The next prime is 3686666866843. The reversal of 3686666866835 is 5386686666863.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3686666866835 - 2³⁴ = 3669486997651 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368666686679 + ... + 368666686688.

It is an arithmetic number, because the mean of its divisors is an integer number (1106000060052).

Almost surely, 2^{3686666866835} is an apocalyptic number.

3686666866835 is a deficient number, since it is larger than the sum of its proper divisors (737333373373).

3686666866835 is an equidigital number, since it uses as much as digits as its factorization.

3686666866835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737333373372.

The product of its digits is 6449725440, while the sum is 77.

The spelling of 3686666866835 in words is "three trillion, six hundred eighty-six billion, six hundred sixty-six million, eight hundred sixty-six thousand, eight hundred thirty-five".