2166223404051 has 18 divisors (see below), whose sum is σ = 3639844768092. Its totient is φ = 1237841944920.

The previous prime is 2166223403969. The next prime is 2166223404089. The reversal of 2166223404051 is 1504043226612.

2166223404051 is a `hidden beast` number, since 2 + 16 + 6 + 2 + 234 + 0 + 405 + 1 = 666.

It is not a de Polignac number, because 2166223404051 - 2¹¹ = 2166223402003 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2166223403997 and 2166223404015.

It is not an unprimeable number, because it can be changed into a prime (2166223404151) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2456035165 + ... + 2456036046.

Almost surely, 2^{2166223404051} is an apocalyptic number.

2166223404051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2166223404051 is a deficient number, since it is larger than the sum of its proper divisors (1473621364041).

2166223404051 is a wasteful number, since it uses less digits than its factorization.

2166223404051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912071231 (or 4912071221 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 2166223404051 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-three million, four hundred four thousand, fifty-one".