2166644266223 has 8 divisors (see below), whose sum is σ = 2350047440160. Its totient is φ = 1989458149120.

The previous prime is 2166644266181. The next prime is 2166644266247. The reversal of 2166644266223 is 3226624466612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166644266223 - 2⁶ = 2166644266159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166644266273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554263483 + ... + 1554264876.

It is an arithmetic number, because the mean of its divisors is an integer number (293755930020).

Almost surely, 2^{2166644266223} is an apocalyptic number.

2166644266223 is a deficient number, since it is larger than the sum of its proper divisors (183403173937).

2166644266223 is a wasteful number, since it uses less digits than its factorization.

2166644266223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108528417.

The product of its digits is 5971968, while the sum is 50.

The spelling of 2166644266223 in words is "two trillion, one hundred sixty-six billion, six hundred forty-four million, two hundred sixty-six thousand, two hundred twenty-three".