66430571 has 16 divisors (see below), whose sum is σ = 70177536. Its totient is φ = 62820576.

The previous prime is 66430541. The next prime is 66430583. The reversal of 66430571 is 17503466.

It is a cyclic number.

It is not a de Polignac number, because 66430571 - 2¹⁰ = 66429547 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66430531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234596 + ... + 234878.

It is an arithmetic number, because the mean of its divisors is an integer number (4386096).

Almost surely, 2^66430571 is an apocalyptic number.

66430571 is a deficient number, since it is larger than the sum of its proper divisors (3746965).

66430571 is a wasteful number, since it uses less digits than its factorization.

66430571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66430571 is about 8150.4951383336. The cubic root of 66430571 is about 405.0009063639. Note that the first 3 decimals are identical.

The spelling of 66430571 in words is "sixty-six million, four hundred thirty thousand, five hundred seventy-one".