2686666921123 has 4 divisors (see below), whose sum is σ = 2689319110608. Its totient is φ = 2684014731640.

The previous prime is 2686666921027. The next prime is 2686666921129. The reversal of 2686666921123 is 3211296666862.

2686666921123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2686666921123 - 2²¹ = 2686664823971 is a prime.

It is a super-2 number, since 2×2686666921123² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2686666921129) 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, 1326093223 + ... + 1326095248.

It is an arithmetic number, because the mean of its divisors is an integer number (672329777652).

Almost surely, 2^{2686666921123} is an apocalyptic number.

2686666921123 is a deficient number, since it is larger than the sum of its proper divisors (2652189485).

2686666921123 is a wasteful number, since it uses less digits than its factorization.

2686666921123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652189484.

The product of its digits is 13436928, while the sum is 58.

The spelling of 2686666921123 in words is "two trillion, six hundred eighty-six billion, six hundred sixty-six million, nine hundred twenty-one thousand, one hundred twenty-three".