6665672111665 has 16 divisors (see below), whose sum is σ = 9141630019200. Its totient is φ = 4570678172160.

The previous prime is 6665672111647. The next prime is 6665672111671. The reversal of 6665672111665 is 5661112765666.

It is not a de Polignac number, because 6665672111665 - 2¹³ = 6665672103473 is a prime.

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, 1004550 + ... + 3786880.

It is an arithmetic number, because the mean of its divisors is an integer number (571351876200).

Almost surely, 2^{6665672111665} is an apocalyptic number.

It is an amenable number.

6665672111665 is a deficient number, since it is larger than the sum of its proper divisors (2475957907535).

6665672111665 is a wasteful number, since it uses less digits than its factorization.

6665672111665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850792.

The product of its digits is 16329600, while the sum is 58.

The spelling of 6665672111665 in words is "six trillion, six hundred sixty-five billion, six hundred seventy-two million, one hundred eleven thousand, six hundred sixty-five".