66099 has 8 divisors (see below), whose sum is σ = 96192. Its totient is φ = 40040.

The previous prime is 66089. The next prime is 66103. The reversal of 66099 is 99066.

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

It is not a de Polignac number, because 66099 - 2⁴ = 66083 is a prime.

66099 is a strobogrammatic number because it is the same when read upside-down.

66099 is a modest number, since divided by 99 gives 66 as remainder.

It is not an unprimeable number, because it can be changed into a prime (66029) 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, 969 + ... + 1034.

It is an arithmetic number, because the mean of its divisors is an integer number (12024).

2⁶⁶⁰⁹⁹ is an apocalyptic number.

66099 is a deficient number, since it is larger than the sum of its proper divisors (30093).

66099 is a wasteful number, since it uses less digits than its factorization.

66099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 66099 is about 257.0972578617. The cubic root of 66099 is about 40.4325963116.

It can be divided in two parts, 6 and 6099, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 66099 in words is "sixty-six thousand, ninety-nine".