66430169 has 8 divisors (see below), whose sum is σ = 75748680. Its totient is φ = 57712896.

The previous prime is 66430163. The next prime is 66430171. The reversal of 66430169 is 96103466.

It can be written as a sum of positive squares in 4 ways, for example, as 12334144 + 54096025 = 3512^2 + 7355^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66430169 is a prime.

It is a super-2 number, since 2×66430169² = 8825934706737122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (66430163) 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, 150074 + ... + 150515.

It is an arithmetic number, because the mean of its divisors is an integer number (9468585).

Almost surely, 2^66430169 is an apocalyptic number.

It is an amenable number.

66430169 is a deficient number, since it is larger than the sum of its proper divisors (9318511).

66430169 is a wasteful number, since it uses less digits than its factorization.

66430169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300619.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 66430169 is about 8150.4704772179. The cubic root of 66430169 is about 405.0000894172. Note that the first 4 decimals are identical.

The spelling of 66430169 in words is "sixty-six million, four hundred thirty thousand, one hundred sixty-nine".