2116453612666 has 8 divisors (see below), whose sum is σ = 3218169192084. Its totient is φ = 1043730548640.

The previous prime is 2116453612649. The next prime is 2116453612687. The reversal of 2116453612666 is 6662163546112.

It can be written as a sum of positive squares in 2 ways, for example, as 2038838438641 + 77615174025 = 1427879^2 + 278595^2 .

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

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, 7248128665 + ... + 7248128956.

Almost surely, 2^{2116453612666} is an apocalyptic number.

2116453612666 is a deficient number, since it is larger than the sum of its proper divisors (1101715579418).

2116453612666 is a wasteful number, since it uses less digits than its factorization.

2116453612666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14496257696.

The product of its digits is 1866240, while the sum is 49.

The spelling of 2116453612666 in words is "two trillion, one hundred sixteen billion, four hundred fifty-three million, six hundred twelve thousand, six hundred sixty-six".