66060109 has 4 divisors (see below), whose sum is σ = 66965116. Its totient is φ = 65155104.

The previous prime is 66060103. The next prime is 66060119. The reversal of 66060109 is 90106066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90106066 = 2 ⋅45053033.

It can be written as a sum of positive squares in 2 ways, for example, as 12404484 + 53655625 = 3522^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 66060109 - 2¹⁷ = 65929037 is a prime.

It is a super-3 number, since 3×66060109³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66060103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452394 + ... + 452539.

It is an arithmetic number, because the mean of its divisors is an integer number (16741279).

Almost surely, 2^66060109 is an apocalyptic number.

It is an amenable number.

66060109 is a deficient number, since it is larger than the sum of its proper divisors (905007).

66060109 is an equidigital number, since it uses as much as digits as its factorization.

66060109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905006.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 66060109 is about 8127.7370159227. The cubic root of 66060109 is about 404.2466491276.

The spelling of 66060109 in words is "sixty-six million, sixty thousand, one hundred nine".