2166850500 has 48 divisors (see below), whose sum is σ = 6309873024. Its totient is φ = 577826400.

The previous prime is 2166850471. The next prime is 2166850501. The reversal of 2166850500 is 50586612.

It is not an unprimeable number, because it can be changed into a prime (2166850501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720784 + ... + 723783.

It is an arithmetic number, because the mean of its divisors is an integer number (131455688).

Almost surely, 2^2166850500 is an apocalyptic number.

2166850500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166850500 is an abundant number, since it is smaller than the sum of its proper divisors (4143022524).

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

2166850500 is a wasteful number, since it uses less digits than its factorization.

2166850500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444589 (or 1444577 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 2166850500 is about 46549.4414574439. The cubic root of 2166850500 is about 1294.0259417474.

The spelling of 2166850500 in words is "two billion, one hundred sixty-six million, eight hundred fifty thousand, five hundred".