66600099 has 6 divisors (see below), whose sum is σ = 96200156. Its totient is φ = 44400060.

The previous prime is 66600097. The next prime is 66600119. The reversal of 66600099 is 99000666.

It is not a de Polignac number, because 66600099 - 2¹ = 66600097 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66600097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3699997 + ... + 3700014.

Almost surely, 2^66600099 is an apocalyptic number.

66600099 is a deficient number, since it is larger than the sum of its proper divisors (29600057).

66600099 is a wasteful number, since it uses less digits than its factorization.

66600099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7400017 (or 7400014 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 66600099 is about 8160.8883707596. Note that the first 3 decimals coincide. The cubic root of 66600099 is about 405.3451287620.

The spelling of 66600099 in words is "sixty-six million, six hundred thousand, ninety-nine".