2166123016 has 16 divisors (see below), whose sum is σ = 4192496640. Its totient is φ = 1048123920.

The previous prime is 2166123007. The next prime is 2166123031. The reversal of 2166123016 is 6103216612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4366936 + ... + 4367431.

It is an arithmetic number, because the mean of its divisors is an integer number (262031040).

Almost surely, 2^2166123016 is an apocalyptic number.

It is an amenable number.

2166123016 is a deficient number, since it is larger than the sum of its proper divisors (2026373624).

2166123016 is a wasteful number, since it uses less digits than its factorization.

2166123016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734404 (or 8734400 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2166123016 is about 46541.6267012660. The cubic root of 2166123016 is about 1293.8811096453.

Adding to 2166123016 its reverse (6103216612), we get a palindrome (8269339628).

The spelling of 2166123016 in words is "two billion, one hundred sixty-six million, one hundred twenty-three thousand, sixteen".