66224109 has 8 divisors (see below), whose sum is σ = 100912960. Its totient is φ = 37842336.

The previous prime is 66224089. The next prime is 66224141. The reversal of 66224109 is 90142266.

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

It is not a de Polignac number, because 66224109 - 2⁵ = 66224077 is a prime.

It is a super-2 number, since 2×66224109² = 8771265225687762, which contains 22 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 (66224209) 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, 1576744 + ... + 1576785.

It is an arithmetic number, because the mean of its divisors is an integer number (12614120).

Almost surely, 2^66224109 is an apocalyptic number.

It is an amenable number.

66224109 is a deficient number, since it is larger than the sum of its proper divisors (34688851).

66224109 is a wasteful number, since it uses less digits than its factorization.

66224109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153539.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66224109 is about 8137.8196711404. The cubic root of 66224109 is about 404.5808985698.

It can be divided in two parts, 6622 and 4109, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 66224109 in words is "sixty-six million, two hundred twenty-four thousand, one hundred nine".