2111655512666 has 8 divisors (see below), whose sum is σ = 3619980878880. Its totient is φ = 904995219708.

The previous prime is 2111655512663. The next prime is 2111655512677. The reversal of 2111655512666 is 6662155561112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2111655512666.

It is not an unprimeable number, because it can be changed into a prime (2111655512663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75416268296 + ... + 75416268323.

It is an arithmetic number, because the mean of its divisors is an integer number (452497609860).

Almost surely, 2^{2111655512666} is an apocalyptic number.

2111655512666 is a deficient number, since it is larger than the sum of its proper divisors (1508325366214).

2111655512666 is a wasteful number, since it uses less digits than its factorization.

2111655512666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150832536628.

The product of its digits is 648000, while the sum is 47.

The spelling of 2111655512666 in words is "two trillion, one hundred eleven billion, six hundred fifty-five million, five hundred twelve thousand, six hundred sixty-six".