66316001 has 4 divisors (see below), whose sum is σ = 66338052. Its totient is φ = 66293952.

The previous prime is 66315973. The next prime is 66316021. The reversal of 66316001 is 10061366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35224225 + 31091776 = 5935^2 + 5576^2 .

It is a cyclic number.

It is not a de Polignac number, because 66316001 - 2¹⁴ = 66299617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66316021) 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 3 ways as a sum of consecutive naturals, for example, 5636 + ... + 12821.

It is an arithmetic number, because the mean of its divisors is an integer number (16584513).

Almost surely, 2^66316001 is an apocalyptic number.

It is an amenable number.

66316001 is a deficient number, since it is larger than the sum of its proper divisors (22051).

66316001 is a wasteful number, since it uses less digits than its factorization.

66316001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22050.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 66316001 is about 8143.4636979605. The cubic root of 66316001 is about 404.7679430661.

Adding to 66316001 its reverse (10061366), we get a palindrome (76377367).

The spelling of 66316001 in words is "sixty-six million, three hundred sixteen thousand, one".