2166858732 has 24 divisors (see below), whose sum is σ = 5062185072. Its totient is φ = 721403200.

The previous prime is 2166858697. The next prime is 2166858761. The reversal of 2166858732 is 2378586612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100119 + ... + 119822.

It is an arithmetic number, because the mean of its divisors is an integer number (210924378).

Almost surely, 2^2166858732 is an apocalyptic number.

It is an amenable number.

2166858732 is an abundant number, since it is smaller than the sum of its proper divisors (2895326340).

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

2166858732 is a wasteful number, since it uses less digits than its factorization.

2166858732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220769 (or 220767 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 2166858732 is about 46549.5298794735. The cubic root of 2166858732 is about 1294.0275804404.

The spelling of 2166858732 in words is "two billion, one hundred sixty-six million, eight hundred fifty-eight thousand, seven hundred thirty-two".