2166544926 has 96 divisors (see below), whose sum is σ = 5963962368. Its totient is φ = 552951360.

The previous prime is 2166544921. The next prime is 2166544927. The reversal of 2166544926 is 6294456612.

2166544926 is a `hidden beast` number, since 2 + 16 + 6 + 544 + 92 + 6 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166544921) 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 47 ways as a sum of consecutive naturals, for example, 29445 + ... + 72111.

It is an arithmetic number, because the mean of its divisors is an integer number (62124608).

Almost surely, 2^2166544926 is an apocalyptic number.

2166544926 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166544926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2981981184).

2166544926 is an abundant number, since it is smaller than the sum of its proper divisors (3797417442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166544926 is a wasteful number, since it uses less digits than its factorization.

2166544926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42726 (or 42723 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 2166544926 is about 46546.1590896607. The cubic root of 2166544926 is about 1293.9651100977.

The spelling of 2166544926 in words is "two billion, one hundred sixty-six million, five hundred forty-four thousand, nine hundred twenty-six".