66243301 has 4 divisors (see below), whose sum is σ = 66307500. Its totient is φ = 66179104.

The previous prime is 66243293. The next prime is 66243313. The reversal of 66243301 is 10334266.

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 40335201 + 25908100 = 6351^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 66243301 - 2³ = 66243293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243701) 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, 30526 + ... + 32623.

It is an arithmetic number, because the mean of its divisors is an integer number (16576875).

Almost surely, 2^66243301 is an apocalyptic number.

It is an amenable number.

66243301 is a deficient number, since it is larger than the sum of its proper divisors (64199).

66243301 is a wasteful number, since it uses less digits than its factorization.

66243301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64198.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66243301 is about 8138.9987713477. The cubic root of 66243301 is about 404.6199778253.

Adding to 66243301 its reverse (10334266), we get a palindrome (76577567).

The spelling of 66243301 in words is "sixty-six million, two hundred forty-three thousand, three hundred one".