66009099 has 8 divisors (see below), whose sum is σ = 94782352. Its totient is φ = 40620960.

The previous prime is 66009077. The next prime is 66009101. The reversal of 66009099 is 99090066.

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

It is not a de Polignac number, because 66009099 - 2²³ = 57620491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1692541 = 66009099 / (6 + 6 + 0 + 0 + 9 + 0 + 9 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66009019) 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, 846232 + ... + 846309.

It is an arithmetic number, because the mean of its divisors is an integer number (11847794).

Almost surely, 2^66009099 is an apocalyptic number.

66009099 is a deficient number, since it is larger than the sum of its proper divisors (28773253).

66009099 is a wasteful number, since it uses less digits than its factorization.

66009099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692557.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 66009099 is about 8124.5983900744. The cubic root of 66009099 is about 404.1425725437.

The spelling of 66009099 in words is "sixty-six million, nine thousand, ninety-nine".