2166065424 has 60 divisors (see below), whose sum is σ = 6209844732. Its totient is φ = 704409600.

The previous prime is 2166065423. The next prime is 2166065431. The reversal of 2166065424 is 4245606612.

2166065424 is a `hidden beast` number, since 2 + 1 + 6 + 606 + 5 + 42 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 341067024 + 1824998400 = 18468^2 + 42720^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2166065423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177537 + ... + 189344.

Almost surely, 2^2166065424 is an apocalyptic number.

2166065424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2166065424 is an abundant number, since it is smaller than the sum of its proper divisors (4043779308).

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

2166065424 is a wasteful number, since it uses less digits than its factorization.

2166065424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366936 (or 366927 counting only the distinct ones).

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

The square root of 2166065424 is about 46541.0079822086. The cubic root of 2166065424 is about 1293.8696424816.

The spelling of 2166065424 in words is "two billion, one hundred sixty-six million, sixty-five thousand, four hundred twenty-four".