66235143513 has 32 divisors (see below), whose sum is σ = 110412011520. Its totient is φ = 34311980160.

The previous prime is 66235143463. The next prime is 66235143539. The reversal of 66235143513 is 31534153266.

It is not a de Polignac number, because 66235143513 - 2¹³ = 66235135321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66235143413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316420 + ... + 482277.

It is an arithmetic number, because the mean of its divisors is an integer number (3450375360).

Almost surely, 2^66235143513 is an apocalyptic number.

It is an amenable number.

66235143513 is a deficient number, since it is larger than the sum of its proper divisors (44176868007).

66235143513 is a wasteful number, since it uses less digits than its factorization.

66235143513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799077.

The product of its digits is 194400, while the sum is 39.

Adding to 66235143513 its reverse (31534153266), we get a palindrome (97769296779).

The spelling of 66235143513 in words is "sixty-six billion, two hundred thirty-five million, one hundred forty-three thousand, five hundred thirteen".