2166643126 has 8 divisors (see below), whose sum is σ = 3262611240. Its totient is φ = 1079106048.

The previous prime is 2166643123. The next prime is 2166643133. The reversal of 2166643126 is 6213466612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166643123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107116 + ... + 2108143.

It is an arithmetic number, because the mean of its divisors is an integer number (407826405).

Almost surely, 2^2166643126 is an apocalyptic number.

2166643126 is a deficient number, since it is larger than the sum of its proper divisors (1095968114).

2166643126 is a wasteful number, since it uses less digits than its factorization.

2166643126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215518.

The product of its digits is 62208, while the sum is 37.

The square root of 2166643126 is about 46547.2139445531. The cubic root of 2166643126 is about 1293.9846597275.

The spelling of 2166643126 in words is "two billion, one hundred sixty-six million, six hundred forty-three thousand, one hundred twenty-six".