660000099 has 8 divisors (see below), whose sum is σ = 960000192. Its totient is φ = 400000040.

The previous prime is 660000097. The next prime is 660000101. The reversal of 660000099 is 990000066.

It is an interprime number because it is at equal distance from previous prime (660000097) and next prime (660000101).

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

It is not a de Polignac number, because 660000099 - 2¹ = 660000097 is a prime.

660000099 is a strobogrammatic number because it is the same when read upside-down.

660000099 is a modest number, since divided by 99 gives 66 as remainder.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (660000091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9999969 + ... + 10000034.

It is an arithmetic number, because the mean of its divisors is an integer number (120000024).

Almost surely, 2^660000099 is an apocalyptic number.

660000099 is a deficient number, since it is larger than the sum of its proper divisors (300000093).

660000099 is a wasteful number, since it uses less digits than its factorization.

660000099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20000017.

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

The square root of 660000099 is about 25690.4670841151. The cubic root of 660000099 is about 870.6588126503.

The spelling of 660000099 in words is "six hundred sixty million, ninety-nine", and thus it is an aban number.