66114209 has 4 divisors (see below), whose sum is σ = 75559104. Its totient is φ = 56669316.

The previous prime is 66114197. The next prime is 66114221. The reversal of 66114209 is 90241166.

66114209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66114197) and next prime (66114221).

It is a cyclic number.

It is not a de Polignac number, because 66114209 - 2⁸ = 66113953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66114239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4722437 + ... + 4722450.

It is an arithmetic number, because the mean of its divisors is an integer number (18889776).

Almost surely, 2^66114209 is an apocalyptic number.

It is an amenable number.

66114209 is a deficient number, since it is larger than the sum of its proper divisors (9444895).

66114209 is an equidigital number, since it uses as much as digits as its factorization.

66114209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444894.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 66114209 is about 8131.0644444624. The cubic root of 66114209 is about 404.3569717649.

The spelling of 66114209 in words is "sixty-six million, one hundred fourteen thousand, two hundred nine".