3665866111 has 8 divisors (see below), whose sum is σ = 3882293280. Its totient is φ = 3449526528.

The previous prime is 3665866079. The next prime is 3665866163. The reversal of 3665866111 is 1116685663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3665866111 - 2⁵ = 3665866079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665869111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77110 + ... + 115228.

It is an arithmetic number, because the mean of its divisors is an integer number (485286660).

Almost surely, 2^3665866111 is an apocalyptic number.

3665866111 is a deficient number, since it is larger than the sum of its proper divisors (216427169).

3665866111 is a wasteful number, since it uses less digits than its factorization.

3665866111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43793.

The product of its digits is 155520, while the sum is 43.

The square root of 3665866111 is about 60546.3963502371. The cubic root of 3665866111 is about 1541.9094366331.

The spelling of 3665866111 in words is "three billion, six hundred sixty-five million, eight hundred sixty-six thousand, one hundred eleven".