2166099 has 8 divisors (see below), whose sum is σ = 3110352. Its totient is φ = 1332960.

The previous prime is 2166077. The next prime is 2166113. The reversal of 2166099 is 9906612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166099 - 2⁷ = 2165971 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2166029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27732 + ... + 27809.

It is an arithmetic number, because the mean of its divisors is an integer number (388794).

2^2166099 is an apocalyptic number.

2166099 is a deficient number, since it is larger than the sum of its proper divisors (944253).

2166099 is a wasteful number, since it uses less digits than its factorization.

2166099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55557.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2166099 is about 1471.7673049773. The cubic root of 2166099 is about 129.3876327836.

The spelling of 2166099 in words is "two million, one hundred sixty-six thousand, ninety-nine".