66232340513 has 4 divisors (see below), whose sum is σ = 66234711060. Its totient is φ = 66229969968.

The previous prime is 66232340507. The next prime is 66232340533. The reversal of 66232340513 is 31504323266.

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 52117237264 + 14115103249 = 228292^2 + 118807^2 .

It is a cyclic number.

It is not a de Polignac number, because 66232340513 - 2⁴ = 66232340497 is a prime.

It is a super-3 number, since 3×66232340513³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66232340533) 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, 1142858 + ... + 1199411.

It is an arithmetic number, because the mean of its divisors is an integer number (16558677765).

Almost surely, 2^66232340513 is an apocalyptic number.

It is an amenable number.

66232340513 is a deficient number, since it is larger than the sum of its proper divisors (2370547).

66232340513 is a wasteful number, since it uses less digits than its factorization.

66232340513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370546.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 66232340513 its reverse (31504323266), we get a palindrome (97736663779).

The spelling of 66232340513 in words is "sixty-six billion, two hundred thirty-two million, three hundred forty thousand, five hundred thirteen".