2166024378 has 32 divisors (see below), whose sum is σ = 4967069184. Its totient is φ = 616844592.

The previous prime is 2166024353. The next prime is 2166024401. The reversal of 2166024378 is 8734206612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71100 + ... + 96887.

It is an arithmetic number, because the mean of its divisors is an integer number (155220912).

Almost surely, 2^2166024378 is an apocalyptic number.

2166024378 is an abundant number, since it is smaller than the sum of its proper divisors (2801044806).

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

2166024378 is a wasteful number, since it uses less digits than its factorization.

2166024378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168306.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 2166024378 is about 46540.5670141652. The cubic root of 2166024378 is about 1293.8614696739.

The spelling of 2166024378 in words is "two billion, one hundred sixty-six million, twenty-four thousand, three hundred seventy-eight".